WorksheetsWater and Solutions
Total questions: 26
Worksheet time: 13mins
What percentage of the human body is water?
about 20%
about 40%
about 60%
about 80%
What is the chemical name for water?
hydrogen oxide
hydrogen monoxide
dihydrogen dioxide
dihydrogen monoxide
One of the reasons water is the key to life on Earth is because it's really good at ___
dissolving stuff
lubricating stuff
freezing solid
floating stuff
To whiten whites, you might use a solution of sodium hypochlorite, better known as ___
borax
laundry detergent
hydrogen peroxide
bleach
What makes bleach so good at its job is that it's a really ___
weak oxidizer
strong oxidizer
weak acid
strong acid
What is the chemical formula of hydrogen peroxide?
HO
HO2
H2O2
H2O4
The bottle of hydrogen peroxide contains a solution where water is the liquid, or ___
solvent
solute
electrolyte
nonpolar compound
The dissolved material in a solution is called the ___
solvent
solute
electrolyte
ionic compound
Oxygen is very good at pulling electrons toward it. It's said to have a high ___
isoelectronic state
ductility
conductivity
electronegativity
The electrons in a water molecule tend to spend most of their time ___
near the hydrogens
near the oxygen
along the center line
away from the center line
The polarity of water makes it extremely effective at dissolving things, especially ___
other polar things
other nonpolar things
oils
lipids
A liter of water can dissolve as much as ___ of sucrose
18 grams
180 grams
1800 grams
18 kilograms
Water based solutions are also called ___
distilled solutions
saturated solutions
hydrated solutions
aqueous solutions
Water does not dissolve ___
non-ionic, nonpolar substances
ionic, nonpolar substances
non-ionic, polar substances
ionic, polar substances
Water can decrease the attraction between ions of different charges. We call this it's ___
electron affinity
dielectric property
electronegativity
electrolytic property
Ions in water, separated through dissolution, are called ___
loosened charges
dynamic electricity
free radicals
electrolytes
Who developed the idea that a solution's electrical conductivity is linked to the concentration of ions?
Antoine Lavoisier
Svante Arrhenius
Dmitri Mendeleev
Joseph Priestley
Negative ions and positive ions were given the names, respectively, of ___
onion and caution
minion and potion
boson and fermion
anion and cation
A solute that dissociates, or breaks apart, completely when dissolved in water is called a ___
nonelectrolyte
weak electrolyte
strong electrolyte
neutral electrolyte
A solute that only dissociates partially when dissolved in water, so it's only somewhat conductive, is called a ___
nonelectrolyte
weak electrolyte
strong electrolyte
neutral electrolyte
Solutes that dissolve in water but don't conduct electricity at all, because they don't dissociate into ions, are called ___
nonelectrolytes
weak electrolytes
strong electrolytes
neutral electrolytes
One mole of a compound equals ___
2.062 x 1023 molecules
6.023 x 1022 molecules
6.032 x 1032 molecules
6.022 x 1023 molecules
A mole of hydrogen peroxide weighs ___
24.014 grams
34.014 grams
43.014 grams
54.014 grams
As a rule, molarity equals the number of moles of solute divided by ___
liters of solution
kilograms of a solution
liters of solvent
kilograms of a solvent
Molality is expressed as the number of moles of a solute in a ___
liter of solution
kilogram of a solution
liter of solvent
kilogram of a solvent
To dilute a solution you commonly ___
stir vigorously
add more solute
reduce the amount of solvent
add more solvent
