Acids and alkalis
15 review questions with answers for Acids and alkalis. Read them here, or play the set as a class game on the projector. Free to host, and students join with a code.
pH of a neutral solution?
- 0
- 7Right answer
- 14
- 1
What this set covers
Acids and alkalis through pH, the ions H⁺ and OH⁻, and indicator colors. Questions also cover making salts such as sodium chloride and copper(II) sulfate, the hydrogen and carbon dioxide tests, and strong versus weak acids.
- Common mix-up
- Students often treat strong and concentrated as the same thing, but strong describes an acid that is completely ionised in water, while concentrated describes how much acid is dissolved in the solution.
- Review tip
- List the three acid reactions with a metal, an oxide and a carbonate, write the products of each, and name the gas test that goes with each.
All 15 questions and answers
pH of a neutral solution?
Answer: 7
Ion that makes a solution acidic?
Answer: H⁺
Ion present in excess in an alkaline solution?
Answer: OH⁻
Colour of universal indicator in a strong acid?
Answer: Red
Colour of universal indicator in a strong alkali?
Answer: Purple
Colour of litmus in an alkali?
Answer: Blue
Reaction between an acid and an alkali?
Answer: Neutralisation
Salt formed when hydrochloric acid reacts with sodium hydroxide?
Answer: Sodium chloride
Salt formed when sulfuric acid reacts with copper(II) oxide?
Answer: Copper(II) sulfate
Name for the salts made from nitric acid?
Answer: Nitrates
Products of an acid reacting with a metal such as zinc?
Answer: Salt and hydrogen
Limewater shows carbon dioxide is present by turning…?
Answer: Milky
Sound when a lighted splint is held at the mouth of a tube of hydrogen?
Answer: Squeaky pop
An acid that is completely ionised in water is described as…?
Answer: Strong
Effect on pH of a tenfold increase in H⁺ concentration?
Answer: Decreases by 1
Play it as a class game
Play this set opens it in splycr, where you can host it for your class straight away. Hosting needs no account: put the room code on the projector, and students join from a phone with the code and their first name. Each question plays as multiple choice, and the three wrong options were written for that question.