How many mL of 0.013 M potassium hydroxide are required to reach the equivalence point in the titration of 75 mL 0.166 M hydrocyanic acid?

Answers

Answer 1

Answer:

957.7mL

Explanation:

Using the formula below;

CaVa = CbVb

Where;

Ca = concentration of acid (M)

Va = volume of acid (mL)

Cb = concentration of base (M)

Vb = volume of base (mL)

According to the information provided in this question:

Ca = 0.166 M

Cb = 0.013 M

Va = 75mL

Vb = ?

Using CaVa = CbVb

0.166 × 75 = 0.013 × Vb

12.45 = 0.013Vb

Vb =12.45/0.013

Vb = 957.7mL


Related Questions

equivalent massof sodium​

Answers

Answer:

Sodium

Formula : Na

Equivalent mass:23.0

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Please select the word from the list that best fits the definition
Flow of blood from the heart to the body tissues and back to the heart

Artery
Vein
Capillary
Systemic Circulation
Pulmonary Circulation

Answers

Answer:

Systemic Circulation

Explanation:

Answer:

Systemic Circuit

Systemic circulation carries oxygenated blood from the left ventricle, through the arteries, to the capillaries in the tissues of the body. From the tissue capillaries, the deoxygenated blood returns through a system of veins to the right atrium of the heart.

Explanation:

I hope it's helpful for you ☺️

In animal skin tissue, cell division is responsible for

A. Growth and repair
B. Sexual reproduction
C. Obtaining energy
D. production of sex cells

Answers

Answer: Its A Your Welcome

In animal skin tissue, cell division is responsible for growth and repair. The correct answer is option A.

Cell division is the process by which a single cell divides into two or more daughter cells. This process is essential for growth, repair, and reproduction in living organisms.

Cell division in animal skin tissue is responsible for growth and repair. When the skin is damaged, cells divide to repair the damaged area.

There are two main types of cell division:

Mitosis is the process of cell division that produces two identical daughter cells.Meiosis is the process of cell division that produces four genetically diverse daughter cells, used in the production of gametes (sex cells).

Additionally, cell division is responsible for the growth of skin tissue during development and throughout the life of the organism.

Therefore, the correct answer is option A. Growth and repair.

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Which of the following equations is balanced?
(options in photo)

Answers

Answer:

Option (B)

Explanation:

Na2SO4 (aq) + CaCl2 (aq) → CaSO4 (s) + 2 NaCl (aq)

What characterizes an Arrhenius acid-base reaction?
O A. It forms a conjugate pair.
O B. It forms a salt and water.
O C. It forms hydrogen gas.
OD. It forms a buffer in water.

Answers

An Arrhenius acid-base reaction forms a salt and water.

Arrhenius acid base reaction forms a salt and water.

Hence, option (B) is correct answer.

What is Arrhenius acid-base reaction ?

Arrhenius acid-base reaction is Arrhenius acid + Arrhenius Base means water + salt. When Arrhenius acid reacts with Arrhenius base it produce water and salt as product. This is known as neutralization reaction.

Thus, from the above conclusion we can say that Arrhenius acid base reaction forms a salt and water.

Hence, option (B) is correct answer.

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The half-reaction at the cathode in an electrochemical cell is given below. What other half-reaction would most likely occur at the anode to produce a spontaneous reaction?

Ni^2(aq)+2e-=Ni(s)

A. Cu(s)=Cu^2+(aq)+2e-
B. Zn(s)=Zn^2+(aq)+2e-
C. Mg^2+(aq)+2e-=Mg(s)
D. Ni(s)=Ni^2+(aq)+2e-

Answers

The half-reaction is Zn → Zn⁺² + 2e⁻ which is most likely occur at the anode to produce a spontaneous reaction.

Hence, option (B) is correct answer.

What is Spontaneous Reaction ?

A reaction which occurs without the intervention of outside is called Spontaneous reaction.  The reaction is Spontaneous when the Δ G < 0 and [tex]E^{\circ}_{\text{cell}}[/tex] > 0.

What is Cathode and Anode ?

Cathode where the reduction occurs. Anode where the oxidation take place.

Cathode: Ni⁺² + 2e⁻ → Ni

Anode: Zn → Zn⁺² + 2e⁻

______________________

Zn + Ni⁺² → Zn⁺²  + Ni

The above reaction is spontaneous reaction.

Thus, from the above conclusion we can say that half-reaction is Zn → Zn⁺² + 2e⁻ which is most likely occur at the anode to produce a spontaneous reaction.

Hence, option (B) is correct answer.

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How is the AHfusion used to calculate the energy required to vaporize a
volume of liquid?
O A. Liters liquid x 1000ml/1L x ml/g x g/mol x AHfusion
O B. Liters liquid x 1000ml/1L x g/ml x mol/g < 1/A Hfusion
C. Liters liquid 1000ml/1L x ml/g x g/mol < 1/AHfusion
O D. Liters liquid x 1000ml/1L x g/ml x mol/g < AHfusion

Answers

Your Question is complete but the options are very much confusing and contradicting. Below you will find the true and full content.

The correct answer for the given question about Enthalpy of vaporisation is ( Volume of liquid in L x 1000 g/L x ΔHvap cal/gm ) where ΔHvap = 540 cal/gm (in case of water).

What is Enthalpy of vaporisation ?

The amount of energy (enthalpy) required to convert a portion of a liquid into a gas is known as the enthalpy of vaporisation, abbreviated as ΔHvap  and also referred to as the latent heat of vaporisation or heat of evaporation.

How to solve this question?

Let E be the energy required to calculate the energy required to vaporise a volume of liquid.

Then,

E = Volume of liquid in L x Density of liquid in gm/L  x ΔHvap in cal/gm

and E will came out in calorie.

E = Volume of liquid in L x 1000 g/L x 540 cal/gm --- (in case of water)

Thus we can conclude that to calculate the energy required to vaporise a volume of liquid, we can use the formula with ΔHvap which is E = (Volume of liquid in L x Density of liquid g/L x ΔHvap cal/gm ) and the answer will be in calorie.

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What are most likely the values of the quantum numbers I and mI for an
electron in a 3p orbital?

A. I = 1, 2, 3; mI = -1/2, + 1/2
B. I = 3; mI = -1/2, + 1/2
C. I = 0, 1, 2, 3; mI = -1, 0, 1
D. I = 1; mI = -1, 0, 1

Answers

Answer:

I think its D

Not too sure

The quantum numbers denote the position of an electron in the orbital. The angular momentum quantum number (l) and magnetic quantum number (ml) of the 3p orbital is I = 1; mI = -1, 0, 1. Thus, option D is correct.

What are quantum numbers?

The quantum numbers are conserved quantities used to describe the energy and the position of the electron in the atomic orbital. The azimuthal, principal, magnetic, and spin are the four quantum numbers.

The angular momentum quantum number (l) represents the orbital shape and depends on the principal quantum number, n. The magnetic quantum number (ml) represents the orientation.

If an electron is in a 3p orbital then,

n = 3

l = 1

ml = -1, 0, 1

Therefore, option D. 3p orbital contains I = 1; mI = -1, 0, 1.

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Which of the following would DECREASE the rate of a reaction?

1. add a catalyst
2. increase the concentration
3. increase the volume
4. increase the pressure

Answers

Answer: increasing volume

Explanation: adding a catalyst would increase reaction time and increasing  INCREASING concentration definently makes reaction time alot faster increasing pressure actually makes it more concentrated, so no it is not

Which statement is true for most autotrophic organisms?
A. They carry on extracellular digestion of nutrients before they ingest them.
B. They synthesize organic molecules from inorganic molecules.
C. They obtain organic molecules from heterotrophic organisms.
O O
D. They require no external energy source.

Answers

omg yees

eExplanation:

Question 7 of 10
How much energy is required to melt 2 kg of aluminum? Use the table below
and this equation: Q- mLfusion
Substance
Latent Heat
Fusion
(melting)
(kJ/kg)
Melting
Point
(°C)
Latent Heat
Vaporization
(boiling) (kJ/kg)
Boiling
Point
("C)
Aluminum
400
660
1100
2450
Copper
207
1083
4730
2566
Gold
628
1063
1720
2808
Helium
5.2
-270
21
-269
Lead
245
327
871
1751
Mercury
11.4
-39
295
357
Water
335
0
2258
100
A. 2200 kJ
B. 800 kJ
C. 1600 kJ
D. 1100 kJ

Answers

Answer:

NO 2200! 800 proprobably

Explanation:

just did wrong

Answer:

800 kJ

Explanation:

If one of the reactants in a reaction us Na2O, what is known about the products?

Answers

The answer should be A.

Ok here's the deal

the answer is A: The products will contain exactly 2 Na atoms and 1 O atom.

Explanation:

thank me later space-ex kids

State with reasons, whether sulphur dioxide is acting as an oxidizing agent or a reducing agent in each of the following reactions:

•2H2S(g) + SO2(g) -> 2H2O(l) + 3S(s)

•SO2(g) +H2O(l) +NaClO(aq) -> NaCl(aq) + H2SO4(aq)

Answers

Answer:

A) oxidizing agent is SO2

B) NaClO is the oxidizing agent

Explanation:

A) This is a redox reaction in which oxidation and reduction occur simultaneously.

Thus, in 2H2S(g) + SO2(g) -> 2H2O(l) + 3S(s);

H2S is reduced as follows;

H2S → S + 2H+ + 2e−

We can see that SO2 has been reduced while H2S gets oxidized since it has changed state from - 2 to 0 . Thus sulphur dioxide is the oxidizing agent.

B) SO2(g) + H2O(l) + NaClO(aq) -> NaCl(aq) + H2SO4(aq)

In this, SO2 undergoes oxidation and NaClO is the oxidizing agent

What is the biggest earthquake danger to the people inside a building ?

Answers

Answer:

Most of the hazards to people come from man-made structures themselves and the shaking they receive from the earthquake. The real dangers to people are being crushed in a collapsing building, drowning in a flood caused by a broken dam or levee, getting buried under a landslide, or being burned in a fire.

Hope this helps :> <3

Need organic chemistry 11th grade

for practice and 1 question is enough :)

Answers

Answer:

ok all you need is a little study

Explanation:

organic chemistry isn't something to worry about is something that is a very simple concept if you understand what you're doing so a little bit of studying will help you go through it and you really don't this is not the topics that you will really understand if you just go through it as once so there is no need to worry about organic chemistry it is very simple concept just learning you are a you are close just learn all those simple aspects alkane etc it's very easy

ionic bonds show which characteristics that arent seen in covalent bonds

Answers

Ionic bonds are when one atom is a metal and the other is a nonmetal. One atom has a high electronegativity value while the other value is relatively low. Electrons are transferred in ionic bonds.

In a covalent bond atoms are equal or similar in electronegativity values and both of the atoms are also non metals. Electrons are shared in covalent bonds.

How many atoms of phosphorus are in 7.00 mol of copper(II) phosphate?

Answers

Answer: The number of phosphorus atoms in given amount of copper(II) phosphate is [tex]8.431\times 10^{24}[/tex]

Explanation:

We are given:

Moles of copper(II) phosphate [tex]Cu_3(PO_4)_2[/tex] = 7.00 mol

1 mole of copper(II) phosphate contains 3 moles of copper, 2 moles of phosphorus and 8 moles of oxygen atoms

Moles of phosphorus in copper(II) phosphate = [tex](2\times 7.00mol[/tex]

According to the mole concept:

1 mole of a compound contains [tex]6.022\times 10^{23}[/tex] number of particles

So, 7.00 moles of copper(II) phosphate will contain = [tex](2\times 7\times 6.022\times 10^{23}=8.431\times 10^{24}[/tex] number of phosphorus atoms.

Hence, the number of phosphorus atoms in given amount of copper(II) phosphate is [tex]8.431\times 10^{24}[/tex]

specific rights related to freedom of expression​

Answers

Answer:

beliefs, thoughts, ideas, and emotions

Explanation:

freedom of expression guarantees the freedom to express oneself without government censorship or media censorship.

While playing soccer, Caria slides across one of the lines on the field. When she stands up, what base does she stop?
O calcium hydroxide
O ammonium hydroxide
O zinc hydroxide
potassium hydroxide
l

Answers

Answer:

Canxi hydroxit

Explanation:

Answer:

A- calcium hydroxide

Explanation:

Got it right on Edge.

10. A laboratory experiment requires that
exactly 3 mL of chemical be dispensed into a
test tube. Which piece of equipment would be
MOST appropriate for measuring and
dispensing the chemical?
A another test tube
B a pipette
C a beaker
D a scale balance

Answers

Answer:

B) a pipette

Explanation:

Also known as a graduated pipette, they vary in volume, with most measuring between 0 and 25.0 mL. A small pipette can be used for precise measurement of fluids.

los metales se oxidan

Answers

Los metales no se oxidan

A cart accelerating slower when mass was increased.
1st Law - 3rd Law

Answers

Answer:

Newton's second law

Explanation:

It is mentioning acceleration and mass

Newton's second law's equation = F = m*a

Hope u understood

Please mark brainliest

Thank You

What is the perimeter of a polygon 8cm 6cm, 4cm, 6cm

Answers

Answer:

24cm

Explanation:

The perimeter of a polygon is obtained by the sum of the length of each side of the figure.

The polygon of the problem has four sides with the following measurements:

8cm, 6cm, 4cm and 6cm.

That means the perimeter of this shape is:

8cm + 6cm + 4cm + 6cm =

24cm

(7) need help asappp plss

Answers

Answer:

See explanation

Explanation:

The cold drink chiller is a cold substance which is inserted into a bottle of drink which contains warm liquid particles at a particular temperature.

Once the drink chiller is inserted, the liquid molecules around the drink chiller become cooler, denser and sink away from the drink chiller. Other warmer, less dense molecules of the liquid drink now replaces them around the drink chiller.

A convection current is thus set up for as long as the drink chiller is working.

Which reaction occurs at the cathode of a galvanic cell that has an aluminum electrode in an electrolyte with aluminum ions and copper electrode in an electrolyte with copper ions ? The reduction potential for the reduction of Cu^ 2+ = 0.34 The reduction potential for the reduction of AP^ 3+ =-1.68V.

Answers

Answer:

[tex]{ \bf{Cu {}^{2 + } + 2e \: → \: Cu }}[/tex]

The reaction that occurs at the cathode of a given galvanic cell is:

Cu²⁺  + 2e⁻  → Cu

What is Galvanic Cell?

A galvanic cell can be defined as an electrochemical cell that converts the chemical energy of spontaneous redox reactions into electrical energy. The galvanic cell makes use of chemical reactions to generate electrical energy.

A galvanic cell consists of two half-cells and a salt bridge. Each half-cell further contains an electrode dipped into an electrolyte. When both electrodes are dipped in the same electrolyte, then there is no need for a salt bridge.

At the anode, an oxidation reaction occurs at this electrode. At the cathode, reduction occurs at this electrode. The anode has a negative potential with respect to the solution while the cathode has a positive potential with respect to the solution.

As in the question, the reduction of Cu²⁺ has a positive reduction potential. Therefore, the reduction of the copper will occur at the cathode.

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can someone please explain core and valence electrons in periods for me please​

Answers

Answer:

The electrons of an atom are typically divided into two categories: valence and core electrons. Valence electrons occupy the outermost shell or highest energy level of an atom while core electrons are those occupying the innermost shell or lowest energy levels

Explanation:

i hope u get it :))

Which compound is a hydrocarbon?


C 2 H 6


H 2 O


CO 2


C 6 H 12 O 6

Answers

Answer:

C2H6 OR C6H12O6 THE ANSWER

Explanation:

C2H6

!!!!!!!!!!

because it has both hydrogen and carbon as given in the word "Hydro-carbon"

Nitrogen in plants and soil is changed into nitrogen compounds by _____ ?

Answers

Nitrogen Fixation because It's the process by which atmospheric nitrogen is converted either by a natural or an industrial means to form of nitrogen such as ammonia.

-. You have 100 grams of methane. How many moles do you have?

Answers

Answer:

6.25mol

Explanation:

Using the following formula;

Mole = mass ÷ molar mass

According to this question, there are 100 grams of methane (CH4)

Molar Mass of methane (CH4) = 12 + 1(4)

= 12 + 4

= 16g/mol

mole = 100/16

mole = 6.25moles

Therefore, there are 6.25moles of methane in 100g

2. Which equation does not represent a neutralisation reaction?
HELP PLEASE

Answers

Answer:

Zn + 2HCl => ZnCl2 + H2

Explanation:

This equation represents salt formation or salt preparation. Thus not a neutralization reaction.

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Vit nam chin thng in bin ph vo thi gian no The equity section of Cyril Corporations balance sheet shows the following. Preferred stock6% cumulative, $25 par value, 10,000 shares issued and outstanding $ 250,000 Common stock$8 par value, 100,000 shares issued and outstanding 800,000 Retained earnings 535,000 Total stockholders equity $ 1,585,000 Determine the book value per share of common stock under two separate situations. 1. No preferred dividends are in arrears at the current date. 2. Three years of preferred dividends are in arrears at the current date. how do i solve for x with an equation that says 19 = x - 3 HELP NOW!!! Yani buys 4 dozen flyers for $7.80. What is the unit rate? difference between cyberbullying ,cyber wellness and cyber safety Solve the system of equations: y=2x+1. y=x^2+2x-8 50 points!What is the area of triangle xyz? Use special right triangles to help find the height. Leave your answer in terms of radical. Show work. probability please help i will give brainliest A directional state is when systems are not static but are steadily moving? The point-slope form of the equation of the line that passes through (-9, -2) and (1, 3) is y - 3 = 1/2 (x - 1). What is the slope-intercept for of the equation for this line?A.) y = 1/2x + 2B.) y = 1/2x - 4C.) y = 1/2x + 5/2D.) y = 1/2x - 7/2PLEASE HELP!!!!!!!!!!! Question 18 of 24Read the following chart, which shows the percentage of the world's grossdomestic product over time. Which of the following conclusions is supportedby the data?A. Asia's economies have grown significantly as globalization hasincreased since the end of World War II.B. The former U.S.S.R. saw its economies increase along with theincrease of globalization that followed World War II.C. Globalization has done little to affect economies outside ofWestern Europe and the United States.D. Africa's economies have suffered greatly because of increasingglobalization following World War II. Why was the United States slower to abolish slavery than Great Britain? A. Slaveholders in the United States were willing to fight a war in order to prevent abolition. B. Slaves in the United States were treated more fairly than slaves elsewhere in the world. C. U.S. society was largely unfamiliar with Enlightenment principles that emphasized equality. D. The United States lacked significant leaders willing to speak out in favor of abolition. Which sentence is the most clear for a fourth grade reader? A. Do not worry about nothing when getting your blood pressure taken at the doctor's office. B. Upon your arrival at the physician's office, the nurse employs a sphygmomanometer to measure the arterial blood pressure. C. It is a good idea to go to the doctor if you feel sick, but you will first see the nurse, and she will check things like blood pressure, and she will get the doctor after she is done. D. When you go to the doctor's office, the nurse will see you first so she can take your blood pressure. write a letter to your friend discussing about excursion you went at the hospital The price for digital downloads of music is represented by the linear function f(x) shown on the graph. The price for digital downloads of movies is represented by g(x) = x, where x is the number of movies downloaded and g(x) is the total cost in dollars.You want to make 2 downloads, and you have $5. Determine the least expensive option. 1. You download 2 songs. 2. You download 2 movies. 3. You download 1 song and 1 movie. 4. You don't have enough money for 2 downloads. A college dorm room measures 14 ft wide by 13 ft long by 6 ft high. What is the air in it under normal conditions? The group of mountains along the western (Pacific) side of North America are called the: Laurentianso AppalachiansCordilleraRockiesTURN IT INASK FOR HELPNEXT QUESTIONTERMS OF USE Which of the following explainswhy mountain tops are a greatplace for observatories?A. They have less gravity.B. There is less magnetic interference.C. The weather is calmer.D. There is less atmosphere above them. how did the united states demonstrate its isolationism policy before world war 2? A rectangular. Garden bed measures 8 x 6 feet a water faucet is at one corner of the bed hose must be long enough to reach opposite corner when stretched straight. Find required length of hose