Which statement best describes the use of a chemical indicator in a titration? It must be measured to the nearest 0. 01 mL. It must be colored in the acid solution. It must measure pH directly at all pH values. It must change color near the equivalence point.

Answers

Answer 1

The statement that best describes the use of a chemical indicator in a titration is it must change color near the equivalence point.

What are indicators?

Indicators are those compounds which are used in the titration process to estimate the presence of chemical entities in it.

In the titration process, indicator is added in the titration solution which changes its color when the reaction mixture goes towards the equivalence point and becomes disappear at that point.

Hence option (4) is correct.

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Related Questions

What is required for a steady state reaction that is not required for an equilibrium reaction?.

Answers

Answer:

any thing going on within the organism its self- and is not unatural

Explanation:

Hurrrryyyyy pls




Based on the experiment below, what was the dependent variable?
Bean
Soil
Bean
Soil
Bean
Soil
Height 20.4 cm
Mass: 159
Height: 45.7 cm
Mass: 6.19
Height: 46.5 cm
Mass: 6.69
LI
Daily water 10 mL
A Daily water 50 mL
B
Daily water 100 mL
С

Answers

Answer:

The growth of the plant

Explanation:

The growth of the plant from the bean soil is the dependent variable I believe. This is because it could change depending on many factors for e.g. the amount of light or water

Describe the process used to balance an equation?

Answers

Answer:

Explanation:

When you balance a chemical equation, you change coefficients. You never change subscripts. A coefficient is a whole number multiplier. To balance a chemical equation, you add these whole number multipliers (coefficients) to make sure that there are the same number of atoms on each side of the arrow

What do dark read areas indicated on the map?

Answers

Answer: Classifies cultural features, such as populated areas, main roads, and boundaries, on older maps.

What does the energy hill represent on an energy diagram?
A. The potential energy gained by the products when a reaction
happens
B. The potential energy the reactants have stored in molecular bonds
O C. The additional potential energy the reactants must gain in order to
react
D. The final amount of potential energy of the products of the
reaction

Answers

B.The potential energy the reactants have stored in molecular bonds

Select all the correct answers.
What do scientists use to communicate extremely small measurements?
unit prefixes
A. base units
B. physical models
C. graduated cylinders
D. scientific notation

Answers

D

This is when very large or very small numbers must be written. They come in the format or 5.43 x 10^3 or can be written as 8.26E6. The numbers will vary depending on your number.

Carson’s class visited a hydroelectric plant on a field trip during their study of energy. The process interested him, and he had the chance to observe it in action. Explain how moving water generates electrical power, and describe where it goes.

Answers

Answer:

look in your science book

Explanation:

Hydroelectricity or hydroelectric power is the electricity generated from hydropower. It is the Hydropower which supplies one sixth of the worlds electricity. Here water in motion is used to generate the electricity.

How water generates electricity?

Hydroelectricity is produced by utilizing the gravitational force of moving water. Hydropower plant requires a dam. The dam is a massive wall that blocks the flow of the river, therefore a lot of water collects behind the dam. Near bottom of the dam, there is an intake from which water is left into the dam.

The device which is used to obtain energy from the moving water is called the turbine.  The turbine is connected by a shaft to the generator. When the water rotates the turbine, electrical energy is generated.

Hydropower plants also have a pumped storage where the water is kept as a reserve for periods of peak power demand.

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Convert −55 ◦C to Kelvin

Answers

Answer:

-459.67 good luck and hope you pass

If an object does Not explode, catch fire, or dissolve, how would you describe this object? (Three answers)​

Answers

Non-combustible

eg:-glass,water,stone, Portland cement etc ...

Answer:

Noncombustible

Explanation:

Not explode means no blastsCan't catch fire hence no combustionnot dissolve means not reacts with H and O

So

Some examples are ,glass ,stone

Which statement about London dispersion forces is true?

Answers

The London dispersion force is "the weakest intermolecular force"

Why is carbon dioxide a necessary part of the atmosphere.

Answers

Answer:

helps to trap heat in our atmosphere

Meta-bromoaniline was treated with nano2 and hcl to yield a diazonium salt. Draw the product obtained when that diazonium salt istreated with each of the following reagents:

Answers

Answer:

I believe is the correct answer

Explanation:

100bromoaniline+nano2+hcl

What is primarily released in radioactive decay?

Answers

Answer:

When radioactive atoms decay, they release energy in the form of ionizing radiation (alpha particles, beta particles and/or gamma rays). The energy is called ionizing radiation because it has enough energy to knock tightly bound electrons from an atom's orbit. This causes the atom to become a charged ion.

Explanation:

___________ in the stomach are responsible for the mechanical digestion that takes place there.

Answers

SMOOTH MUSCLES in the stomach are responsible for the mechanical digestion that takes place there.

A student finds that the mass of 25mL of an unknown liquid is 20.3g. What is the density of this substance?

Answers

Answer:

Explanation:

as we know density is g/ml or d=(g/ml) we will plug in the values in their respective positions and get the answer.

So the density is 0.812(round it according to the sig figs it asks for).

NEED HELP ASAP PLEASE !!!

Answers

Explanation:

H2S is the limiting reagent

H2S= 1/8 (least value)

O2= 1/4

How much heat will be absorbed in
boiling 5 grams of ice at 100°c and
at 1 atm?

Answers

Answer: 8


Source
Trust me bro

60 points please help me i will appreciate it!

Answers

Answer:

[tex]\huge\boxed{\sf v = 62.7 \ L}[/tex]

Explanation:

Given Data:

Mole = n = 3.38 mol

Temp = t = 269 K

Pressure = 1.19 atm

Gas constant = R = 0.08206 L atm K⁻¹ mol⁻¹

Required:

Volume = v = ?

Formula:

Pv = nRT

Solution:

Rearranging formula

[tex]\displaystyle v = \frac{nRT}{P} \\\\v = \frac{(3.38)(0.08206)(269)}{1.19} \\\\v = \frac{74.6}{1.19} \\\\v = 62.7 \ L\\\\\rule[225]{225}{2}[/tex]

We have more solid volatiles than our other giant members.
what planet is this or planets

Answers

Answer:

Jupiter

Explanation:

it's big and the ring around it

Look at the diagram. What is substance X?
Enter your answer
What is substance x??

Answers

Molten cryolite is the substance which serves as an electrolyte in the diagram.

What is an Electrolyte?

This is defined as a substance that conducts electricity when dissolved in water.

Molten cryolite serves as the electrolyte as it helps dissolve molten aluminium oxide and increases the conductivity of the solution which was why it was chosen as the most appropriate choice.

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Answer: Molten cryolite

Explanation: Molten cryolite serves as the electrolyte as it helps dissolve molten aluminium oxide and increases the conductivity of the solution which was why it was chosen as the most appropriate choice.

fast please 20 points

Answers

Answer:

Horse SS and Horse Ss

Explanation:

The horse look the same except for Horse ss

A chemical supply company sells sulfuric acid (h2so4) in a concentration of 4. 00 m. What volume of this solution would you need to make 12. 0 ml of a 0. 50 m h2so4 solution?

Answers

Answer:

H3CS06

Explanation:

A chemical supply company sells sulfuric acid (H3CS06) in a concentration of 4.00 M. What volume of this solution would you need to make 12.0 mL of a 0.50 M H2SO4 s…

Molarity is the ratio of a mole of the solute of the substance to the liter of solution. The volume of solution required to make 12.0 ml of 0.50 M solution is 1.5 mL.

What is molar dilution?

Molar dilution is the calculation of the molarity or the volume of the unknown value from the known value. It is given as,

[tex]\rm M_{1}V_{1}= \rm M_{2}V_{2}[/tex]

Given,

Initial molarity = 4.00 M

Initial volume =?

Final molarity = 0.50 M

Final volume = 12.0 mL

Substituting values in the equation:

[tex]\begin{aligned} \rm V_{1} &= \rm \dfrac{\rm M_{2}V_{2}}{M_{1}}\\\\&= \dfrac{0.50 \times 12.0 }{4.00}\\\\&= 1.5 \;\rm ml\end{aligned}[/tex]

Therefore, 1.5 ml of 4.00 M sulfuric acid must be used to make 12 ml of 0.50 M solution.

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Devise a three‑step synthesis of the product from 1‑methylcyclohexene

Answers

The three step synthesis of the product from 1-methyl cyclohexane includes the addition of;

C6H5CO3H in CH2Cl2C6H5Li in etherPCC in CH2Cl2.

Three step synthesis from 1 methyl cyclohexene

The three steps reaction involves the use of Reagannts such as;

Reagent 1: C6H5CO3H in CH2Cl2.Reagent 2: C6H5Li in ether.Reagent 3: PCC in CH2Cl2.

Each step in the synthesis is arranged in the order:

Step 1: Epoxide formationStep 2: Nucleophilic additionStep 3: Oxidation of OH group.

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Three step synthesis of the product from 1‑methylcyclohexene includes epoxide formation, nucleophilic attack and oxidation of -OH group.

What is synthesis reaction?

Synthesis reactions are those reactions in which formation of new product takes place by the rearrangement or combination of reactant molecules.

Given question is incomplete so the complete pic of the question is attached below. In the given reaction reagents 1, 2 and 3 are used is C₆H₅CO₃H in CH₂Cl₂, C₆H₅Li in ether and PCC in CH₂Cl₂ respectively.

In the tree step synthesis process, in the first step formation of epoxide takes place, in the second step attack of nucleophile on epoxide takes place and finally in the third step oxidation of hydroxyl group to ketone group takes plce.

Hence 3 step synthesis includes epoxide formation, nucleophilic attack and oxidation of -OH group.

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The use of evaporation and condensation to separate the partsof a mixture is called _____

Answers

Answer: Evaporation Condensation is used to seperate the parts of a mixture

Explanation: This is because it is the first order of the distilation process

The use of evaporation and condensation to separate the parts of a mixture is called distillation.

What is distillation?

Separating salt water to produce pure water and salt is an example of a simple distillation mixture.

The water begins to evaporate during the distillation process, and the vapor cools down to form pure water.

A second container is used to collect the pure water.

Thus, the use of evaporation and condensation to separate the parts of a mixture is called distillation.

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Why can water molecules store energy in more ways than neon atoms?


Select the correct answer.


A. Water molecules can rotate, but neon atoms cannot.

B. Water molecules can collide with other particles more than neon atoms can.

C. Water molecules can change their speed, but neon atoms cannot.

D. Water molecules can absorb heat more easily than neon atoms can.

Answers

Answer:

B . Water molecules can collide with other particles more than neon atoms can.

Cyanide and water react in a proton transfer reaction to form hydrogen cyanide and hydroxide

Answers

The proton transfer reaction between Cyanide and water can be written as; X^- + H2O -----> HX + OH^-

What is a proton transfer reaction?

A proton transfer reaction is one in which a proton is moved from one chemical specie to another.It is in fact and acid - base reaction in the Brownstead - Lowry sense.

The proton transfer reaction between Cyanide and water can be written as(Let the cyanide ion be shown as X);

X^- + H2O -----> HX + OH^-

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The proton transfer reaction to form hydrogen cyanide and hydroxide is

X⁻ + H₂O → HX + OH⁻

What is a proton transfer reaction?

A reaction in which a proton H⁻ is removed from one species and accepted by another species.

An example of a proton transfer is Brønsted acid reacting with a Brønsted base.

Thus, the proton transfer reaction to form hydrogen cyanide and hydroxide is X⁻ + H₂O → HX + OH⁻

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A box is pushed across the floor for a distance of 5 metters with a force of 50N in 5 seconds. a. how much work is done? b. what is the power. also what formulas are used.​

Answers

Answer:

50W

Explanation:

The formula and is

W = F × s

(force x distance)

W= 50 N× 5 m =250 N m=250 J

Done in 5 seconds the power is

p

=

W

t

where

t

=time

p

=

250

J

5

=

50 J

/s

=50 W

Answer:

Maybe 250 newtons

Explanation:

abcdefghijklmnopqrstuvwxyz

Answers

Answer:

dam aye someone give this person a medal

Explanation:

how many moles are needed to make 2.5 L of a 3.8 M solution?

Answers

Answer:

9.5

Explanation:

that the answer I hope am correct

Consider the two‑step synthesis of 2‑hydroxy‑2,4‑dimethylpentanoic acid using the reagents provided

Answers

The two step synthesis 2‑hydroxy‑2,4‑dimethyl pentanoic acid of involves compounds as represented in the attached image.

Two step synthesis of organic compounds

From the task content:

It therefore follows that the Starting compound A and intermediate compound B are as represented in the attached image.

Compound A is 4-methyl pentan-2-one

Remarks: The reagents provided are, H3O, Potassium cyanide and Hydrogen cyanide.

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