I need help. Thank you

I Need Help. Thank You
I Need Help. Thank You
I Need Help. Thank You

Answers

Answer 1

Based on the fgiven K_{a} values of the acids, the equilibrim concentrations of[tex]HC_{2}H_{2}O_{2}[/tex] and [tex]NH_{4}^{+}[/tex] is dtermined using ICE tables.

What are acid dissociatio constants [tex]K_{a}[/tex]?

An acid dissociation constant, [tex]K_{a}[/tex] of an acid is a measure of the strength of the acid in solution. The larger the [tex]K_{a}[/tex] value of an acid, the stronger the acid, therefore, acid dissociation constants are usually apply to only weak acids because strong acids have exceedingly large [tex]K_{a}[/tex] values.

It is written as a  qoutient of the equilibrium concentrations of the aqueous species in the acid solution.

[tex]K_{a} = \frac{[H^{+}] [A^-{}]}{HA}[/tex]

For the weak acids such as [tex]HC_{2}H_{2}O_{2}[/tex] and [tex]NH_{4}^{+}[/tex], their equilibrim concentrations are determined using their [tex]K_{a}[/tex] values and an ICE table.

The pH of solutions are estimated using indicators such as methyl orange, methyl red and phenolphthalein. The colors of indicators change according to the pH of the solution

Acidic solutions have pH less than 7 while alkaline solutions have pH greater than 7.

Therefore, acids have low pH and weak acids have low [tex]K_{a}[/tex] values.

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Related Questions

an industry is found to be discharging 20ib per day of benzene into a river with a flow of 10billion gallon per day. what will be the resulting benzene concentration, if the benzene is uniformly mixed with river flow

Answers

Answer:

Explanation:

bullet A layer of benzene (n = 1.50)2.60cm deep floats on water (n = 1.33) that is 6.50 cm deep. What is the apparent distance from the upper benzene surface to the bottom of the water laver when it is viewed at normal incidence?

Which of the following molecules contains a covalent bond?

Answers

Answer:

  m

Explanation:

Answer:

CN is your answer.

Explanation:

Hope this helps!!!

Balance the following equation. (20 pts)

Answers

Answer:

2Cl (aq) + Pb (aq) -> PbCl² (s)

Explanation:

Which statement is true of all proteins? (1 point)


They are created by mutations in DNA.


They carry oxygen in human blood.


Their main function is to cause mutations.


Their structure is related to their function.

Answers

Answer:

Their structure is related to their function.

Explanation:

Protein structure is related to their function. Therefore, the correct option is option D among all the given options.

What is protein?

Proteins are huge biomolecular and macromolecular structures made up of one or even more long amino acid residue chains. Proteins serve a wide range of roles inside animals, including catalyzing metabolic events, DNA replication, reacting to stimuli, provides support to organisms and cells including transporting chemicals.

Proteins differ largely in their amino acid sequence, which is determined by the genetic code from their genes and generally culminates with protein folding into such a particular 3D structure that dictates its function. Protein structure is related to their function.

Therefore, the correct option is option D.

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Which of the following is the primary use of land in the United States?

Question 1 options:

Pasture/range


Forest


Cropland


Urban

Answers

Answer:

pasture/range

Explanation:

this is because more than 1/3 of the country's land is being used for this mean alone.

Answer: Forest

Explanation: The largest percentage of land use in the United States is for forests.

If 30 grams of KCl is dissolved at 10°C, how many additional grams would be needed to make the solution saturated at 60°C? * Captionless Image 45g 20g 15g 75g

Answers

If 30 grams of KCl is dissolved at 10°C, 14 g of KCl should be added to make a saturated solution at 60 °C.

What is a saturated solution?

A saturated solution is a solution in which there is so much solute that if there was any more, it would not dissolve. Its concentration is the same as the solubility at that temperature.

Step 1. Calculate the mass of water.

At 10 °C, the solubility is 31.2 g KCl/100 g H₂O.

30 g KCl × 100 g H₂O/31.2 g KCl = 96 g H₂O

Step 2. Calculate the mass of KCl required to prepare a saturated solution at 60 °C.

At 60 °C, the solubility is 45.8 g KCl/100 g H₂O.

96 g H₂O × 45.8 g KCl/100 g H₂O = 44 g KCl

Step 3. Calculate the mass of KCl that must be added.

44 g - 30 g = 14 g

If 30 grams of KCl is dissolved at 10°C, 14 g of KCl should be added to make a saturated solution at 60 °C.

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Question
How does physical states of a pharmaceutical dosage
form
(Solid,liquid or gas) influence the overall stability and
Storage of the formulated pharmaceutical
product

Answers

Answer:

it,s is so many people do you want to go then

you are not study then stage change of it

How many moles of sodium hydrogen carbonate are present in 2.61 grams of this compound?

Answers

Molar mass of NaHCO_3

23+1+12+3(16)36+4884g/mol

Now

[tex]\\ \sf\longrightarrow No\:of\:moles=\dfrac{Given\:mass}{Molar\:mass}[/tex]

[tex]\\ \sf\longrightarrow No\:of\; moles=\dfrac{2.61}{84}[/tex]

[tex]\\ \sf\longrightarrow No\:of\:moles=0.0312mol[/tex]

how can the ph of antiacid table de determine in laboratory ​

Answers

Answer:

Antacids are bases that react stoichiometrically with acid. The number of moles of acid that can be neutralized by a single tablet of a commercial antacid will be determined by back titration.

Correct me if i'm wrong, Hope This helps

Favor(Brainliest)

#Carryonlearning

Explain how energy is conserved in combustion reactions.

Answers

Answer:

That’s because of the law of conservation of energy, which states that: Energy cannot be created or destroyed.

Explanation:

Energy may change form during a chemical reaction. For example, energy may change from chemical energy to heat energy when gas burns in a furnace. The exact amount of energy remains after the reaction as before.

What is the correct formula that would
result from the combination of the two
ionic species?
K1+ and Cro 2-

Answers

Answer:

A

Explanation:

Is not my personal answer, but here is what I found.

"This entity has been manually annotated by the ChEBI Team. Potassium chromate is the inorganic compound with the formula (K2CrO4). This yellow solid is the potassium salt of the chromate anion"

How would Bohr model show the protons in a carbon atom

Answers

Answer:

The Bohr model show the protons in a carbon atom using the model;  "Electrons move in fixed orbits around a nucleus of protons and neutrons."

According to Bohr's model of the atoms, the Rutherford model is basically correct. This implies that Bohr model accepts the idea of a nucleus containing nucleons(protons and neutrons).

In addition, the model also postulates that electrons are found in fixed orbits. These fixed orbits are called energy levels or shells.

A graphic description of this is shown in the image attached to this answer.

Learn more: brainly.com/question/3964366

Explanation:

A sample of 85.5 g of tetraphosphorous decoxide (P4O10) reacts with 74.9 g of water to produce phosphoric acid (H3PO4) according to the following balanced equation.

P4O10+6H2O⟶4H3PO4

Determine the limiting reactant for the reaction.

H2O

H3PO4

P4O10
Calculate the mass of H3PO4 produced in the reaction.
mass of H3PO4:
g
Calculate the percent yield of H3PO4 if 39.2 g of H3PO4 is isolated after carrying out the reaction.
percent yield:
%

Answers

The limiting reactant here is P4O10 . The percent yield of the product is caculated as 33.3%.

What is the limiting reactant?

The limiting  reactant is the reactant that is in a minute quantity.

Number of moles of P4O10 =  85.5 g/284 g/mol = 0.3 moles

Number of moles of H2O =  74.9 g / 18 g/mol = 4.2 moles

From the reaction equation;

1 mole of P4O10 reacts with 6 moles of H2O

x moles of P4O10 reacts with 4.2 moles of H2O

x = 0.7  moles

Hence, P4O10 is the limiting reactant.

1 mole of P4O10 yields 4 moles of H3PO4

0.3 moles of P4O10 yields

0.3 moles * 4/1 = 1.2 moles

Mass of the H3PO4 = 1.2 moles * 98 g/mol = 117.6 g

Percent yield = 39.2 g/117.6 g * 100/1 = 33.3 %

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Which compound is an alcohol?

CH3Br

CH4

CH3COCH3

CH3CH2OH

Answers

Answer:

[tex]ch3ch2oh \: is \: alcohol \\ because \: it \: havve \: an \: oh \: grp \: \\ thank \: you[/tex]

What is the measurement of 2 polar bears

Answers

Answer:

An adult male is between 2.4-3m (8-10 feet) in size and weighs between 350-680kg (775-1500lbs). Females are slightly smaller at around 1.8-2.4m (6-8 feet) and weigh between 150-250kg (330-550lbs).

I2 is produced by the reaction of 0.4235 mol of CuCl2 according to the following equation: 2CuCl2+4KI⟶2CuI+4KCl+I2. What volume of I2 gas is produced at STP?

Answers

Answer: 4.7432 L

Explanation:

Use stoichiometry: .4235 mol CuCl2 (1 mol I2 / 2 mol CuCl2)(22.4 L / 1 mol I2) = 4.7432 L :)

A patient who is scheduled for an x-ray expresses concerns about being exposed to radiation because he witnessed the effects of radiation on his father, who died of cancer. How should the dental assistant respond to this patient’s concerns?

Answers

The dental assistant should respond to this patient’s concerns by telling him that the amount of x-ray is very minimal and can't cause any negative effect.

What is X-ray?

This is a penetrating form of electromagnetic radiation which produces images of the structures inside your body.

Exposure to large amounts of radiation could increase risk of cancer which is why minimal amounts which is safe is adopted.

Read more about X-ray here https://brainly.com/question/2293312

Please help me

Phylum ___________ contains organisms that have a cutic|e; a f|exible protective covering.

Answers

Answer:

B Nematoda

Explanation:

Fe(NO3)3
Percent composition

Answers

Answer:

Fe: 23.1%

N: 17.4%

O: 59.5%

Explanation:

You take the grams that each weigh on the periodic table and add it all up. Afterward you create fractions of each over the whole. (Example: Fe/Fe+N+O) then you divide and turn that decimal into a percentage.

Help me please, Im giving brainliest answer. ​

Answers

Answer:

Sodium nitride is exothermic reaction and hydrochloric acid is endothermic reaction.

Assume you added 40.0 mL of Vitamin C stock solution instead of 25.0 mL when preparing Solution. How would this affect the reaction rate?

Answers

The reaction rate is affected if the vitamin C is added in lower quantity due to lower amount of reactants.

What happen when the vitamin C is added in lower amount?

If you added 40.0 mL of Vitamin C stock solution instead of 25.0 mL when preparing Solution, the reaction rate is affected because of the lower amount of reactant for the chemical reaction. If the reactants are present in larger amount then the products are also produced in large concentration.

So we can conclude that the reaction rate is affected if the vitamin C is added in lower quantity due to lower amount of reactants.

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How many grams are in 1.23 x 1020 atoms of arsenic?

Answers

Given the data from the question, the mass of arsenic that contains 1.23×10²⁰ atoms is 0.0153 g

Avogadro's hypothesis

6.02×10²³ atoms = 1 mole of arsenic

But

1 mole of arsenic = 75 g

Thus, we can say that:

6.02×10²³ atoms = 75 g of arsenic

How to determine the mass that contains 1.23×10²⁰ atoms

6.02×10²³ atoms = 75 g of arsenic

Therefore,

1.23×10²⁰ atoms = (1.23×10²⁰ × 75) / 6.02×10²³ atoms)

1.23×10²⁰ atoms = 0.0153 g of arsenic

Thus, 1.23×10²⁰ atoms is present in 0.0153 g of arsenic

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(2) 8.1.3 Write down the structural formula of alcohol used in this reaction. ​

Answers

Answer:

-OH

Explanation:

Alcohols generally have the structural formula OH

for example, ethanols structural formula is C2H5OH

Find the grams in 6.25 moles of HC2H302.

Answers

use this formula m=n×M

Your n would be 6.25mols

Your Molar mass would be the number you get after adding the molar mass of your equation: HC2H302. Find your periodic table and look there.

And you plug in the molar number in the formula and you multiply n×M

I would help but I don't have the periodic table with me right now

Which is true of magnetic fields?


A.
They are strongest at each pole, where the field lines are closest together.


B.
They are strongest at the north pole, where the field lines are closest together.


C.
They are strongest at the center of the magnet, where the field lines are farthest apart.


D.
They are strongest at each pole, where the field lines are farthest apart.

Answers

Magnetic lines of force are are strongest at each pole, where the field lines are closest together.

What are magnetic fields?

A magnetic field is the region around a magnet where the influence of the magnet can be felt. The magnetic line of force show the intensity as well as the direction of the magnetic field.

The fact that is true for all magnetic fields is that they are strongest at each pole, where the field lines are closest together.

Learn more about the magnetic field: https://brainly.com/question/14848188?

what are the states of matter for the following equation?

6Br⁻ + XeO₃ + 6H⁺ → 3Br₂ + Xe + 3H₂O

Answers

Answer:

Explanation:

On the reactant side, XeO3 is a strong oxidizing agent. It can be a solid or gas. Most likely it is in a solid state.

H+ and Br- combine to form HBr which is a weak acid. So H+ and Br- are in an aqueous state.

On the product side, both Br2 and Xe are not very soluble in water. They will be in gaseous state and H2O is water i.e. liquid state.

SO2 + H2O +_ H2SO3
I need to know how to balance simple direct combination reactions

Answers

Hi so first of all count the number of atoms on both sides.
S = 1
O = 2

H = 2, O = 1

H = 2, S = 1, O = 3

Have a go at multiplying and seeing if you can get each atom to have the same number.

1. The molecule of Aspirin C_{9}*H_{8} * O_{4} contains 9C atomsatoms, and 4 Oxygen atomsHow are we using the molecular formula to write a conversion factor and use them in the calculation of the weight of compounds ?

Answers

The mass can be obtained from the molar mass when the number of moles is known.

What is molecular formular?

The molecular formlar is the formula of the compound that shows the number of atoms of each element that is present in the molecule. Asprin is a moecule that has the molecular formula C9H8O4.

To use the molecular formula to determine weight, we have to know the number of moles involved.

Mass = number of moles * molar mass.

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Where are the most greenhouse gases generated during the production of electricity?

Answers

Answer: city w

Explanation:

cities w,y,z all use renewable energy (sun, water, wind) which offput any greenhouse emmissions,

city w uses coal which produces greenhouse gases when used (burnt).

hope this helped! ♡

Complete the balanced dissociation equation , help please!

Answers

Answer:

Al3Br1 -> Al1Br3

Explanation:

I believe you just swap it but I’m not 100%

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