Quiz about AP Chemistry

Question 1

HNO₃ (aq) + KOH (aq) $$\longrightarrow$$ KNO₃ (aq) + H₂O (l) This reaction is a(n)...

Accepted Answer

acid-base reaction

Answer

oxidation-reduction reaction

Answer

precipitation reaction

Question 2

2AgNO₃ (aq) + Cu (s) $$\longrightarrow$$ Cu(NO₃)₂ (aq) + 2Ag (s)

This reaction is a(n)...

Accepted Answer

oxidation-reduction reaction

Answer

acid-base reaction

Answer

precipitation reaction

Question 3

What is the oxidation number of the Mn in: $$Mn_2O_7$$

Accepted Answer

+7

Answer

+2

Answer

-2

Answer

-7

Question 4

Identify the insoluble compound:

Accepted Answer

$$CaSO_4$$

Answer

$$Fe\left(NO_3\right)_3$$

Answer

$$NH_4Cl$$

Answer

$$KNO_3$$

Question 5

Identify the soluble compound:

Accepted Answer

$$NaOH$$

Answer

$$Pb_3\left(PO_4\right)_2$$

Answer

$$BaSO_4$$

Answer

$$Mg\left(OH\right)_2$$

Question 6

Will the following combination of solutions result in the formation of a precipitate?

Accepted Answer

No

Answer

Yes: KOH

Answer

Yes: NaNO₃

Question 7

Will the following combination of solutions result in the formation of a precipitate?

Accepted Answer

No

Answer

Yes: NaOH

Answer

Yes: NH₄NO₃

Question 8

What is the oxidation number of the Na in: NaCl

Accepted Answer

+1

Answer

+2

Answer

-1

Answer

0

Question 9

What is the oxidation number of the N in: $$NH_4^+$$

Accepted Answer

-3

Answer

+1

Answer

-4

Answer

-5

Question 10

A student has a 1g sample of each of the following compounds: NaCl, KBr, and KCl. Which of the following lists the samples in order of increasing number of moles in the sample?

Accepted Answer

KBr<KCl<NaCl

Answer

NaCl<KCl<KBr

Answer

NaCl<KBr<KCl

Answer

KCl<NaCl<KBr

Question 11

Which of the following is a strong acid commonly used in AP Chemistry experiments?

Accepted Answer

Hydrochloric acid (HCl)

Answer

Acetic acid (CH3COOH)

Answer

Carbonic acid (H2CO3)

Answer

Phosphoric acid (H3PO4)

Question 12

In a titration experiment, what is the purpose of using a phenolphthalein indicator?

Accepted Answer

To determine the endpoint of the titration

Answer

To measure the temperature change

Answer

To calculate the concentration of the base

Answer

To neutralize the acid

Question 13

What is the primary reason for using a buffer solution in a chemical reaction?

Accepted Answer

To maintain a constant pH

Answer

To speed up the reaction

Answer

To increase the solubility of reactants

Answer

To act as a catalyst

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