AnswersCrowley Original Credit Chemistry BNeutralization Reactions

Titration Reactions Answers

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Which of these is the main goal of any titration?

A
to observe the effect of indicators on acids
B
to observe the effect of indicators on bases
C
to determine the concentration of one of the reactants
D
to determine the effects of a base on one of the products
2
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Look at the diagram below.Which best describes what is taking place in the diagram?

Question illustration
A
The calibration of an acid is being completed with a base.
B
A direct measurement of pH is taking place.
C
An indirect measurement of pH is taking place.
D
The final volume of an acid or base is being measured.
3

Maya, a student, performs a titration. She completes the following steps as part of her titration procedure.1. She cleans and rinses a burette with base solution.2. She fills the burette with standardized base solution.3. She adds a base from a burette to an acid.4. She observes a color change in the Erlenmeyer flask.5. She continues to add more base.Based on the above procedure, will she obtain accurate results?

A
Yes, because the more base there is, the better the results will be.
B
No, because she initially contaminated the burette with base.
C
Yes, because she used a standardized base solution in the burette.
D
No, because she did not stop adding base once the color changed.
4

Which is a disadvantage of using chemical indicators?

A
They are expensive to use.
B
They measure pH directly.
C
They must be selected for a narrow pH range.
D
They do not use electricity to operate.
5

Which step accurately describes how to measure the final burette volume?

A
Locate the bottom of the meniscus and record volume to the nearest 0.01 mL.
B
Locate the bottom of the meniscus and record volume to the nearest 0.1 mL.
C
Locate the top of the meniscus and record volume to the nearest 0.01 mL.
D
Locate the top of the meniscus and record volume to the nearest 0.1 mL.
6

A chemist is about to perform a titration by adding a base to an acid. What is the most important reason for using a base instead of water to rinse out the burette?

A
to make sure the burette is not blocked
B
to prevent any bacteria from growing in the burette
C
to make sure the base will flow quickly though the burette
D
to prevent dilution of the base, which may affect the results
7

When are drops of indicator most likely added to the Erlenmeyer flask?

A
when preparing the burette
B
when filling the pipette with acid
C
when recording the initial burette volume
D
when preparing to measure pH change
8

Which of the glassware shown below is an Erlenmeyer flask?

A
Option
Option A
B
Option
Option B
C
Option
Option C
D
Option
Option D
9

Which of the following is the main reason to use titration in chemistry?

A
to write a balanced chemical equation for a reaction
B
to calculate the number of moles of an acid or base
C
to use stoichiometric ratios for converting moles
D
to find the molarity of an unknown acid or base
10

Which of the following would be the best reason to use titration for monitoring the effects of acid rain on drinking water?

A
to determine the concentration of acid in drinking water
B
to find out if the drinking water contains helpful nutrients for the body
C
to find out if there are other poisonous chemicals in the drinking water
D
to determine the molar ratio of acid to base in the drinking water

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