24.5.2 Aqueous Halogen Compounds

Question 1

HCl is one of the most important industrial chemicals. For what is it primarily used?

Answer 1

Cleaning steel before galvanizing

Question 2

Although HF is a weak acid, it is commercially important because it is one of very few substances that will react with _____.

Answer 2

glass

Question 3

What is the most important industrial source of hydrochloric acid?

Answer 3

A byproduct of chlorination of other compounds

Question 4

Why is it impossible to produce hydrobromic acid by reacting the bromide salt with sulfuric acid?

Answer 4

Because sulfuric acid is too strong an oxidizer.

Question 5

Which choice shows the hydrogen halides in order of acid strength?

Answer 5

HI > HBr > HCl > HF

Question 6

How is chlorine found in nature?

Answer 6

as a solid salt

Question 7

Which is a balanced equation for the production of chlorine gas?

Answer 7

2NaCl(aq) + 2H2O(l) → 2NaOH(aq) + H2(g) + Cl2(g)

Question 8

One of the most important sources of fluorine is from the calcium salt known as fluorspar, CaF2. How can fluorine be produced from fluorspar?

Answer 8

React fluorspar with sulfuric acid.

Question 9

If a halogen, X2, reacts with water, the products are hypohalous acid, the halide ion, and a solvated proton. This is an example of a what type of reaction?

Answer 9

Disproportionation

Question 10

The “per” prefix, as in potassium perchlorate, means that the halogen is in an oxidation state of +7. This is a highly oxidized and metastable state. If the perchlorate is mixed with another substance that is easily oxidized, a highly exothermic reaction can occur. Which of the following mixtures would be a suitable fuel for fireworks?

Answer 10

All of these