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Quiz 5 Practice

If you have a solution of 2g of sugar and 100mL of water, what is the solute?

2g of Sugar

100ml of Water

None of the Above

Both are solutes

When solid LiCl is added to water it dissolves because the Li+ ions are attracted to the

Oxygen atom (δ −) of water.

Hydrogen atom (δ +) of water.

Both oxygen and hydrogen atoms

None of the above

Which of the following reactions represent the dissociation of a strong electrolyte in water?

NH3(g) + H2O(l) ---> NH4OH(aq)

CH3OH(l) ---> CH3OH(aq)

Na2SO4(s) ---> 2Na+(aq) + SO42−(aq)

C2H6O(l) ---> C2H6O (aq)

What would the reactants be when the strong electrolyte NaCl(s) dissolved in water?

Na+(aq) + Cl-(aq)

NaCl (s)

NaCl (g)

H2O(l)

How many Eq's are there in 0.315 mole of Ca2+?

1.315 eq

.1575 eq

.945 eq

.630 eq

How many grams are needed to prepare a .312M solution of KClO3?

21.22g

19.1178g

15.31g

16.333333g

How many eq's are there in 1 mole of Fe3+?

What is the Molarity(M) of hydrobromic acid(Hbr) solution if 455mL contains 1.80mol of hydrogen bromide.

4 M

3.96 M

2.78 M

4.99 M

31.65 g of sodium chloride is added to 220.0 mL of water at 34 °C. What is the new freezing point? Assume the sodium chloride completely dissociates in the water. Given: density of water at 35 °C = 0.994 g/mL Kf water = 1.86 °C kg/mol

1.86 C

9.21 C

-9.21 C

-18.42 C

What is 2% NaCl solution ?

Isotonic

Hypotonic

Hypertonic

None of the Above

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