AnswersFoothill-B Period-Chemistry-2627BLab: Titration

Lab: Titration — Unit test Answers

15 verified answers
1
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reactant

Question illustration
C
C6H5OH(aq)
H
H2O(l)
C
C6H5O–(aq)
H
H3O+(aq)
2
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Why is citric acid added to food?

t
to add color
t
to add tartness
t
to add bitterness
t
to add sweetness
3

Several substances are labeled on the pH scale below.Which substance has the lowest [H+] concentration but is still considered an acid?

Question illustration
m
milk
b
blood
g
gastric fluid
h
household lye
4

best

S
Salts form from hydrogen ions and hydroxide ions in neutralization reactions.
M
Most salts do not dissociate when dissolved in water.
M
Most salts form solutions that are neutral.
S
Solutions of salt and water conduct electricity.
5

An unknown substance turns methyl orange solution red. This shows that the substance

i
is a base.
i
is water.
i
is an acid.
i
is an alkaloid.
6

How does litmus paper identify a base?

A
A base turns red litmus blue.
A
A base turns blue litmus red.
A
A base turns orange litmus red.
A
A base turns yellow litmus blue.
7

Consider the chemical equation below.Which is the net ionic equation?

Question illustration
A
Option
Option A
B
Option
Option B
C
Option
Option C
D
Option
Option D
8

Which salt is produced when NH4OH reacts with HNO3?

K
KNO2
N
NaNO3
N
NH4NO3
N
NH4NO2
9

The two products that are formed when a solution of HNO3 and a solution of NaOH react are water and

N
NaNO2.
N
NaNO3.
N
NaHNO.
N
NaHNO3.
10

The equivalence point in a titration refers to the point when

t
the mL of the acid equals the mL of the base.
t
the molarity of the acid used in the reaction equals the molarity of the base used in the reaction.
t
the number of moles of one reactant reacts completely with the moles of the other reactant.
t
the acid in the flask turns clear.
11

Which of the following is the last step in performing a titration?

f
finding out which pH indicator works
d
determining the concentration of an unknown base
f
finding the number of moles of product produced in a reaction
d
determining the molecular masses of the products in the reaction
12

Which of these is true about a pH meter?

I
It is inexpensive to use.
I
It measures pH indirectly.
I
It does not require calibration.
I
It can be used in any acid-base titration.
13

Which piece of glassware shown below is used to hold and dispense a solution of known concentration during a titration?

Question illustration
A
Option
Option A
B
Option
Option B
C
Option
Option C
D
Option
Option D
14

The pH of lemon juice at 298 K is found to be 2.32. What is the concentration of ions in the solution? Use .

Question illustration
A
Option
Option A
B
Option
Option B
C
Option
Option C
D
Option
Option D
15

Four different solutions (I, II, III, and IV) are labeled on the pH scale below.Why would solution IV be considered the most concentrated base out of the four substances?

Question illustration
I
It has the highest concentration of hydrogen ions.
I
It has the highest concentration of hydronium ions.
I
It has the highest concentration of oxide ions.
I
It has the highest concentration of hydroxide ions.

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