Quiz 5.2 Neutralization Reactions

What is a precipitate?
1. A solid product of a chemical reaction that does not dissolve in solution
2. A solid product of a chemical reaction that dissolves in solution
3. A solid reactant in a chemical reaction that does not dissolve in solution
4. A solid reactant in a chemical reaction that dissolves in solution
What is the precipitate that sometimes forms during an acid-base neutralization?
1. Salt
2. Sugar
3. Carbon
4. Water
Which is the balanced chemical reaction that occurs in catalytic converters?
1. 2N₂O₃(g) → 2N₂(g) + 3O₂(g)
2. N₂O₃(g) → 2N₂(g) + 3O₂(g)
3. 2SO₂ + O₂(g) → 2SO₃(g)
4. 2SO₃(g) + H₂O(l) → H₂SO₄(aq)
Old mines sites and their environmentally unfriendly operations have been responsible for severe impacts on the environment in Ontario. Which of these is not a result of these mining practices?
1. Old scrubbers found on the mining smokestacks were very inefficient, and now their chemicals contaminate the soils around the old mines
2. Heavy metals were left in old slag heaps, where they can dissolve and enter the water supply
3. Acid leaching dissolves metals found in the soil, allowing them to enter the water system
4. Chemical reactions involving iron sulphide in the old tailings form sulphuric acid and decrease soil pH in the area
“The soil is removed from the natural site, is treated with acid to leach the heavy metals out, then with a base to neutralize the soil and cause the heavy metals to precipitate out.” What process does this statement describe?
1. Restoring soils contaminated with toxic mine waste
2. Using scrubbers to clean smokestacks
3. Using lime to restore acidic lakes
4. Using catalytic converters to reduce automobile emissions
This leaf from a sweetgum tree indicates chlorosis, a condition in which it cannot make enough chlorophyll. That is why it lacks proper green colour. It cannot make chlorophyll because it cannot take up enough of a specific nutrient it needs from the soil when the soil pH is too high.

The tree cannot take up which nutrient?
1. Iron
2. Phosphorus
3. Calcium
4. Magnesium
Which of the following is always a product of a neutralization reaction?

I) A precipitate
II) A salt
III) Water
1. II and III
2. I, II and III
3. I only
4. I and III
Which is a cause of acid precipitation?
1. Nitrogen oxides
2. Ammonia
3. Ozone
4. Chlorofluorocarbons (CFCs)
This beekeeper wears protective clothing to avoid a painful bee sting.

A bee sting is painful because the bee releases methanoic acid, which attacks nerves in the skin. It can be treated using a neutralization reaction by applying a cream that contains
1. ammonia.
2. nitric acid.
3. Vitamin C.
4. sulphur dioxide.
The salt that forms in a neutralization reaction may not be soluble in water. This is called
1. a precipitate.
2. a base.
3. an aqueous solution.
4. an oxide.