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Worksheets

Water and Solutions

Total questions: 26

Worksheet time: 13mins

Name
Class
Date
1.

What percentage of the human body is water?

a)

about 20%

b)

about 40%

c)

about 60%

d)

about 80%

2.

What is the chemical name for water?

a)

hydrogen oxide

b)

hydrogen monoxide

c)

dihydrogen dioxide

d)

dihydrogen monoxide

3.

One of the reasons water is the key to life on Earth is because it's really good at ___

a)

dissolving stuff

b)

lubricating stuff

c)

freezing solid

d)

floating stuff

4.

To whiten whites, you might use a solution of sodium hypochlorite, better known as ___

a)

borax

b)

laundry detergent

c)

hydrogen peroxide

d)

bleach

5.

What makes bleach so good at its job is that it's a really ___

a)

weak oxidizer

b)

strong oxidizer

c)

weak acid

d)

strong acid

6.

What is the chemical formula of hydrogen peroxide?

a)

HO

b)

HO2

c)

H2O2

d)

H2O4

7.

The bottle of hydrogen peroxide contains a solution where water is the liquid, or ___

a)

solvent

b)

solute

c)

electrolyte

d)

nonpolar compound

8.

The dissolved material in a solution is called the ___

a)

solvent

b)

solute

c)

electrolyte

d)

ionic compound

9.

Oxygen is very good at pulling electrons toward it. It's said to have a high ___

a)

isoelectronic state

b)

ductility

c)

conductivity

d)

electronegativity

10.

The electrons in a water molecule tend to spend most of their time ___

a)

near the hydrogens

b)

near the oxygen

c)

along the center line

d)

away from the center line

11.

The polarity of water makes it extremely effective at dissolving things, especially ___

a)

other polar things

b)

other nonpolar things

c)

oils

d)

lipids

12.

A liter of water can dissolve as much as ___ of sucrose

a)

18 grams

b)

180 grams

c)

1800 grams

d)

18 kilograms

13.

Water based solutions are also called ___

a)

distilled solutions

b)

saturated solutions

c)

hydrated solutions

d)

aqueous solutions

14.

Water does not dissolve ___

a)

non-ionic, nonpolar substances

b)

ionic, nonpolar substances

c)

non-ionic, polar substances

d)

ionic, polar substances

15.

Water can decrease the attraction between ions of different charges. We call this it's ___

a)

electron affinity

b)

dielectric property

c)

electronegativity

d)

electrolytic property

16.

Ions in water, separated through dissolution, are called ___

a)

loosened charges

b)

dynamic electricity

c)

free radicals

d)

electrolytes

17.

Who developed the idea that a solution's electrical conductivity is linked to the concentration of ions?

a)

Antoine Lavoisier

b)

Svante Arrhenius

c)

Dmitri Mendeleev

d)

Joseph Priestley

18.

Negative ions and positive ions were given the names, respectively, of ___

a)

onion and caution

b)

minion and potion

c)

boson and fermion

d)

anion and cation

19.

A solute that dissociates, or breaks apart, completely when dissolved in water is called a ___

a)

nonelectrolyte

b)

weak electrolyte

c)

strong electrolyte

d)

neutral electrolyte

20.

A solute that only dissociates partially when dissolved in water, so it's only somewhat conductive, is called a ___

a)

nonelectrolyte

b)

weak electrolyte

c)

strong electrolyte

d)

neutral electrolyte

21.

Solutes that dissolve in water but don't conduct electricity at all, because they don't dissociate into ions, are called ___

a)

nonelectrolytes

b)

weak electrolytes

c)

strong electrolytes

d)

neutral electrolytes

22.

One mole of a compound equals ___

a)

2.062 x 1023 molecules

b)

6.023 x 1022 molecules

c)

6.032 x 1032 molecules

d)

6.022 x 1023 molecules

23.

A mole of hydrogen peroxide weighs ___

a)

24.014 grams

b)

34.014 grams

c)

43.014 grams

d)

54.014 grams

24.

As a rule, molarity equals the number of moles of solute divided by ___

a)

liters of solution

b)

kilograms of a solution

c)

liters of solvent

d)

kilograms of a solvent

25.

Molality is expressed as the number of moles of a solute in a ___

a)

liter of solution

b)

kilogram of a solution

c)

liter of solvent

d)

kilogram of a solvent

26.

To dilute a solution you commonly ___

a)

stir vigorously

b)

add more solute

c)

reduce the amount of solvent

d)

add more solvent