Question

Describe the process that takes place between the participants in the neutralization reaction between the strong acid hydrochloric acid, HCl(aq), and water insoluble chromium(III) hydroxide, Cr(OH)₃(s), forming water and chromium(III) chloride, CrCl₃(aq). Mention the nature of the particles in the solution before and after the reaction.

(a) Because hydrochloric acid is  ---Select--- an acid a base a binary covalent compound a binary ionic compound an oxyacid , it reacts with water to form  ---Select--- hydrogen atoms hydronium ions hydroxide ions protons and  ---Select--- chlorate ions chloride ions hydronium ions hydroxide ions .

Because it is  ---Select--- a weak acid a strong acid a weak base a strong base , the reaction is  ---Select--- a chain reaction a completion reaction a reversible reaction a substitution reaction leaving only  ---Select--- hydronium ions hydroxide ions protons and  ---Select--- chlorate ions chloride ions hydrochloric acid molecules water molecules in solution.

(b) Because chromium(III) hydroxide is  ---Select--- a strong base an exception to the solubility rules insoluble in water , it  ---Select--- does not produce any ions produces a small amount of hydroxide ions separates into chromium and hydroxide ions when exposed to water.

The reaction of chromium(III) hydroxide with water is  ---Select--- absent a chain reaction a completion reaction a reversible reaction a substitution reaction .

(c) The instant the two solutions are mixed the solution contains the following particles: (Select all that apply.)

chlorate ionschloride ionschromium hydroxide moleculeschromium ionshydrochloric acid moleculeshydronium ionshydroxide ionswater moleculesnone of the above

(d) When the  ---Select--- chlorate ions chloride ions hydrochloric acid molecules hydronium ions water molecules collide with the  ---Select--- chromium hydroxide molecules chromium ions hydroxide ions water molecules , they react to form  ---Select--- chlorate ions chloride ions chromium hydroxide molecules chromium ions hydronium ions hydroxide ions hydrochloric ions hydrochloric acid molecules water molecules .

This reaction prevents the  ---Select--- chlorate chloride chromium hydronium hydroxide cations from returning to the solid, resulting in the gradual  ---Select--- combustion dissolution eradication precipitation sublimation of the chromium(III) hydroxide solids.

If  ---Select--- a smaller amount of acid than base is equivalent amounts of acid and base are a greater amount of acid than base is mixed together, the  ---Select--- chlorate ions chloride ions hydrochloric acid molecules hydronium ions water molecules and  ---Select--- chromium hydroxide molecules chromium ions hydroxide ions water molecules will completely neutralize each other.

(e) At the end of the reaction the solution contains the following particles: (Select all that apply.)

chlorate ionschloride ionschromium hydroxide moleculeschromium ionshydrochloric acid moleculeshydronium ionshydroxide ionswater moleculesnone of the above

Answer 1

a) Because hydrochloric acid is  --- an acid --, it reacts with water to form -- hydronium ions-- and  --- chloride ions -- .

Because it is  --a strong acid-- , the reaction is  -- a completion reaction --leaving only  --- hydronium ions -- and  --- chloride ions -- in solution.

(b) Because chromium(III) hydroxide is  --- insoluble in water-- , it  --- produces a small amount of hydroxide ions - when exposed to water.

The reaction of chromium(III) hydroxide with water is  --- a reversible reaction - .

(c) The instant the two solutions are mixed the solution contains the following particles: (Select all that apply.)

chloride ions , chromium hydroxide molecules, chromium ions, hydronium ions, hydroxide ions, water molecules

(d) When the  --- hydronium ions - collide with the  --- hydroxide ions -- , they react to form  -- water molecules .

This reaction prevents the  --- hydroxide ions - from returning to the solid, resulting in the gradual  -dissolution - of the chromium(III) hydroxide solids.

If  --- equivalent amounts of acid and base are - mixed together, the  --- hydronium ions - and  --hydroxide ions-- will completely neutralize each other.

(e) At the end of the reaction the solution contains the following particles:

chloride ions, chromium ions, water molecules