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U7 Solutions Pt 1

Total questions: 14

Worksheet time: 42mins

Name
Class
Date
1.

A substance is classified as an electrolyte because

a)

it contains covalent bonds

b)

its aqueous solution has a pH value of 7

c)

it has a high melting point

d)

its aqueous solution conducts an electric

current

2.

Based on Reference Table F, which of these

saturated solutions has the lowest concentration of

dissolved ions?

a)

AgCl(aq)

b)

NaCl(aq)

c)

NiCl2(aq)

d)

MgCl2(aq)

3.

The attraction between water molecules and an Na+ ion or a Cl ion occurs because water molecules

are

a)

symmetrical

b)

polar

c)

nonpolar

d)

linear

4.

At standard pressure, which substance becomes

less soluble in water as temperature increases from

10.°C to 80.°C?

a)

HCl

b)

KCl

c)

NaCl

d)

NH4Cl

5.

Which compound is insoluble in water?

a)

Na3PO4

b)

NH4Cl

c)

KOH

d)

PbSO4

6.

Which compound is least soluble in water at

60. °C?

a)

NaCl

b)

KClO3

c)

KNO3

d)

NH4Cl

7.

According to your Reference Tables, which

substance forms an unsaturated solution when 80

grams of the substance is dissolved in 100 grams

of H2O at 10°C?

a)

KI

b)

KNO3

c)

NaNO3

d)

NaCl

8.

An unsaturated aqueous solution of NH3 is at 90°C

in 100. grams of water. According to Reference

Table G, how many grams of NH3 could this

unsaturated solution contain?

a)

20. g

b)

15 g

c)

5 g

d)

10. g

9.

According to Reference Table G, how many grams

of KNO3 would be needed to saturate 200 grams of

water at 70ºC?

a)

43 g

b)

86 g

c)

134 g

d)

268 g

10.

According to Reference Table G, a temperature

change from 10°C to 30°C would have the least

effect on the solubility of

a)

SO2

b)

NH3

c)

KClO3

d)

NaCl

11.

Base your answer to the following question on

Given the diagram below that shows carbon

dioxide in an equilibrium system at a temperature

of 298 K and a pressure of 1 atm:

Which changes must increase the solubility of the

carbon dioxide?

a)

decrease pressure and increase temperature

b)

increase pressure and increase temperature

c)

decrease pressure and decrease temperature

d)

increase pressure and decrease

temperature

12.

The solubility of KCl(s) in water depends on the

a)

pressure on the solution

b)

rate of stirring

c)

temperature of the water

d)

size of the KCl sample

13.

When PbI2(s) is added to Na2CO3(aq), a white

precipitate is formed. According to Reference

Table F, the white precipitate most likely is

a)

KNO3

b)

Na2CO3

c)

PbCO3

d)

NaI

14.

A solute is added to water and a portion of the

solute remains undissolved. When equilibrium

between the dissolved and undissolved solute is

reached, the solution must be

a)

dilute

b)

unsaturated

c)

supersaturated

d)

saturated