LT 4.1-4.3 Practice Test

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Use the following to practice for your summative tests!

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1. The total concentration of all ions in a 0.250 M solution of HCl is __________.

1 point

essentially zero.

0.125 M

0.250 M

0.500 M

0.750 M

Clear selection

2. A strong electrolyte is one that __________ completely in solution.

1 point

reacts

associates

disappears

ionizes

Clear selection

3. A weak electrolyte exists predominantly as __________ in solution.

1 point

atoms

ions

molecules

electrons

an isotope

Clear selection

6. Of the species below, only __________ is not an electrolyte ,

1 point

HCl

Rb₂SO₄

KOH

NaCl

Clear selection

7. What are the spectator ions in the reaction between KOH (aq) and HNO₃ (aq)?

1 point

K⁺¹ and H⁺¹

H⁺¹ and OH⁻¹

K⁺¹ and NO₃⁻¹

H⁺¹ and NO₃⁻¹

OH⁻¹ only

Clear selection

8. Combining aqueous solutions of BaI₂ and Na₂SO₄ affords a precipitate of BaSO₄. Which ion(s) is/are spectator ions in the reaction?

1 point

Ba²⁺ only

Na⁺ only

Ba²⁺ and SO₄²⁻

Na⁺ and I⁻

SO₄²⁻ and I⁻

Clear selection

9. Which ion(s) is/are spectator ions in the formation of a precipitate of AgCl via combining aqueous solutions of CoCl₂ and AgNO₃?

1 point

Co²⁺ and NO₃⁻

NO₃⁻ and Cl⁻

Co²⁺ and Ag⁺

Cl⁻

NO₃⁻

Clear selection

10. The balanced net ionic equation for precipitation of CaCO₃ when aqueous solutions of Na₂CO₃ and CaCl₂ are mixed is __________.

1 point

2Na⁺ (aq) + CO₃²⁻ (aq) → Na₂CO₃ (aq)

2Na⁺ (aq) + 2Cl⁻ (aq) → 2NaCl (aq)

Na⁺ (aq) + Cl⁻ (aq) → NaCl (aq)

Ca²⁺ (aq) + CO₃²⁻ (aq) → CaCO₃ (s)

Na₂CO₃ (aq) + CaCl₂ (aq) → 2NaCl (aq) + CaCO₃ (s)

Clear selection

11. When aqueous solutions of AgNO₃ and KI are mixed, AgI precipitates. The balanced net ionic equation is __________.

1 point

Ag⁺ (aq) + I⁻ (aq) → AgI (s)

Ag⁺ (aq) + NO₃⁻ (aq) → AgNO₃ (s)

Ag⁺ (aq) + NO₃⁻ (aq) → AgNO₃ (aq)

AgNO₃ (aq) + KI (aq) → AgI (s) + KNO₃ (aq)

AgNO₃ (aq) + KI (aq) → AgI (aq) + KNO₃ (s)

Clear selection

12. When H₂SO₄ is neutralized by NaOH in aqueous solution, the net ionic equation is __________.

1 point

SO₄²⁻ (aq) + 2Na+ (aq) → Na₂SO₄ (aq)

SO₄²⁻ (aq) + 2Na+ (aq) → Na₂SO₄ (s)

H+ (aq) + OH⁻ (aq) → H₂O (l)

H₂SO₄ (aq) + 2OH⁻ (aq) → 2H₂O (l) + SO₄²⁻ (aq)

2H+ (aq) + 2NaOH (aq) → 2H₂O (l) + 2Na+ (aq)

Clear selection

13. The spectator ions in the reaction between aqueous perchloric acid and aqueous barium hydroxide are __________.

1 point

OH⁻ and ClO₄⁻

H⁺; OH⁻; ClO₄⁻; Ba²⁺

H⁺ and OH⁻

H⁺ and Ba²⁺

ClO₄⁻ and Ba²⁺

Clear selection

14. The balanced equation for he complete neutralization of H₂SO₄ by KOH in aqueous solution is __________.

1 point

2H⁺ (aq) + 2OH⁻ (aq) → 2H₂O (l)

2H⁺ (aq) + 2KOH (aq) → 2H₂O (l) + 2K⁺ (aq)

H₂SO₄ (aq) + 2OH⁻ (aq) → 2H₂O (l) + SO₄²⁻ (aq)

H₂SO₄ (aq) + 2KOH (aq) → 2H₂O (l) + K₂SO₄ (s)

H₂SO₄ (aq) + 2KOH (aq) → 2H₂O (l) + K₂SO₄ (aq)

Clear selection

15. Aqueous potassium chloride will react with which one of the following in a precipitation reaction?

1 point

calcium nitrate

sodium bromide

lead nitrate

barium nitrate

sodium chloride

Clear selection

16. Which of the following is soluble in water at 25°C?

1 point

Fe₃(PO₄)₂

Fe(OH)₂

Fe(NO₃)₂

FeCO₃

FeS

Clear selection

17. Which of the following is insoluble in water at 25°C?

1 point

Mg₃(PO₄)₂

Na₂S

(NH₄)₂CO₃

Ca(OH)₂

Ba(C₂H₃O₂)₂

Clear selection

18. When aqueous solutions of __________ are mixed, a precipitate forms.

1 point

NiBr₂ and AgNO₃

NaI and KBr

K₂SO₄ and CrCl₃

KOH and Ba(NO₃)₂

Li₂CO₃ and CsI

Clear selection

19. Which one of the following compounds is insoluble in water?

1 point

Na₂CO₃

K₂SO₄

Fe(NO₃)₃

ZnS

AgNO₃

Clear selection

20. Which combination will produce a precipitate?

1 point

NaC₂H₃O₂ (aq) and HCl (aq)

NaOH (aq) and HCl (aq)

AgNO₃ (aq) and Ca(C₂H₃O₂)₂ (aq)

KOH (aq) and Mg(NO₃)₂ (aq)

NaOH (aq) and HC₂H₃O₂ (aq)

Clear selection

21. Which combination will produce a precipitate?

1 point

NH₄OH (aq) and HCl (aq)

AgNO₃ (aq) and Ca(C₂H₃O₂)₂ (aq)

NaOH (aq) and HCl (aq)

NaCl (aq) and HC₂H₃O₂ (aq)

NaOH (aq) and Fe(NO₃)₂ (aq)

Clear selection

22. The net ionic equation for the reaction between aqueous sulfuric acid and aqueous sodium hydroxide is __________.

1 point

H⁺ (aq) + HSO₄⁻ (aq) + 2OH⁻ (aq) → 2H₂O (l) + SO₄²⁻ (aq)

H⁺ (aq) + HSO₄⁻ (aq) + 2Na⁺ (aq) + 2OH⁻ (aq) → 2H₂O (l) + 2Na⁺ (aq) + SO₄²⁻ (aq)

SO₄²⁻ (aq) + 2Na⁺ (aq) → 2Na⁺ (aq) + SO₄²⁻ (aq)

H⁺ (aq) + OH⁻ (aq) → H₂O( l)

2H⁺ (aq) + SO₄²⁻ (aq) + 2Na⁺ (aq) + 2OH⁻ (aq) → 2H₂O (l) + 2Na⁺ (aq) + SO₄²⁻ (aq)

Clear selection

23. The net ionic equation for the reaction between aqueous nitric acid and aqueous sodium hydroxide is __________.

1 point

H⁺ (aq) + HNO₃ (aq) + 2OH⁻ (aq) →2H₂O (l) + NO₃⁻ (aq)

HNO₃ (aq) + NaOH (aq) → NaNO₃ (aq) + H₂O (l)

H⁺ (aq) + OH⁻ (aq) → H₂O (l)

HNO₃ (aq) + OH⁻ (aq) → NO₃⁻ (aq) + H₂O (l)

H⁺ (aq) + Na⁺ (aq) +OH⁻ (aq) → H₂O (l) + Na⁺ (aq)

Clear selection

26. A neutralization reaction between an acid and a base (metal hydroxide) produces __________.

1 point

water and a salt

hydrogen gas

oxygen gas

sodium hydroxide

ammonia

Clear selection

30. The balanced reaction between aqueous nitric acid and aqueous strontium hydroxide is __________.

1 point

HNO₃ (aq) + Sr(OH)₂ (aq) → Sr(NO₃)₂ (aq) + H₂ (g)

HNO₃ (aq) + Sr(OH)₂ (aq) → H₂O (l) + Sr(NO₃)₂ (aq)

HNO₃ (aq) + SrOH (aq) → H₂O (l) + SrNO₃ (aq)

2HNO₃ (aq) + Sr(OH)₂ (aq) → 2H₂O (l) + Sr(NO₃)₂ (aq)

2HNO₃ (aq) + Sr(OH)₂ (aq) → Sr(NO₃)₂ (aq) + 2H₂ (g)

Clear selection

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