Reactions in Aqueous Solution, chemistry homework help

Question 1

Identify the spectator ions in the reaction Ca(NO3)2 + 2NaCl(aq) → CaCl2(aq) + 2NaNO3(aq)

Select one:

a.Na+, NO3

b. Ca+2, NO3

c. Na+, Cl

d. Ca+2, Cl

e. Na+, Cl, Ca+2, NO3

Question 2

What is the oxidation number of N in NH4+

Select one:

a. 4

b. -3

c. -4

d. 1

e. +3

Question 3

What are the spectator ions in the reaction HF(aq) + NaOH(aq) → NaF(aq) + H2O(l)

Select one:

a. H+, F

b. Na+, OH

c. Na+, F

d. Naalone

e. H+, OH

Question 4

What is the oxidation number of S in S2O3-2?

Select one:

a. -3

b. 2

c. 3

d. 4

e. -2

Question 5

Identify the oxidizing agent in the reaction: Cl2 + 2Br → 2Cl + Br2

Select one:

a. Br

b. Cl2

c. Br2

d. Cl

Question 6

What is the molarity of the solution formed by dissolving 10.0g of Ca(NO3)2 in 250 mL aqueous solution? 

Question 7

Consider the reaction H2SO4(aq) + 2NaOH(aq) → 2H2O(l) +Na2SO4(aq). If 25 mL of H2SO4 was needed to react with 15 mL of 0.20 M NaOH, what is the molarity of the H2SO4(aq)? 

Question 8

Which of the following is a weak electrolyte?

Select one:

a. HF(aq)

b. NH4Cl(aq)

c. CaCl2(aq)

d. CH3OH(aq)

e. HCl(aq)

Question 9

Identify the reducing agent in the reaction Ca + 2H+→  Ca+2 + H2

Select one:

a. H2

b. Ca

c. Ca+2

d. H+

Question 10

Chromium is less active than Manganese but more active than Cobalt. Which of the following reactions will occur?

Select one:

a. Co + Cr+3 → Co+2 + Cr

b. Mn + Cr+3 → Mn+2 + Cr

c. Co+2 + Cr+3 → Co+ Cr

d. Co + Cr → Co+2 + Cr+3

e. Mn + Cr → Mn+2 + Cr+3

Question 11

Which of the following is a strong electrolyte?

Select one:

a. HCl(aq)

b. NH4Cl(aq)

c. CaCl2(aq)

d. All of them are

e. None of them are

Question 12

Identify the spectator ions in the reaction: Ca(NO3)2(aq) + Na2CO3(aq)→CaCO3(s) + 2NaNO3(aq)

Select one:

a. Na+, NO3

b. Ca+2, CO3-2

c. Ca+2, NO3

d. All are

e. Na+, CO3-2

Question 13

Which of the following is a nonelectrolyte

Select one:

a. CH3OH(aq)

b. CaCl2(aq)

c. NH4Cl(aq)

d. HCl(aq)

e. NH3(aq)

Question 14

Consider the reaction Mg(OH)2(s) + 2HCl(aq) → MgCl2(aq) +2H2O(l). What is the mass of Mg(OH)2(s) needed to react with 25 ml of 0.20 M HCl(aq)? 

Question 15

What is the coefficient of H2O when the following reaction is balanced: Al(OH)3(s) + H2SO4(aq) →Al2(SO4)3(s) +H2O(l)

Question 16

Which of the following will dissociate completely in dilute aqueous solutions?

Select one:

a. CaCO3(s)

b. CO2(g)

c. NH4Cl(aq)

d. H2O(l)

e. HF(aq)

Question 17

Complete & Balance the following Reaction: Fe(NO3)3(aq) + Na2S(aq) → ? + ? 

Question 18

In which of the following is the oxidation number of the Cl +1?

Select one:

a. HClO

b. HCl

c. HClO2

d. HClO3

e. Cl2

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