Topic 4 Acids and alkalis

• What term describes a substance that attacks metals, stonework and skin?

• Name an acidic solution found in the kitchen.

• Name an alkaline solution used in the kitchen.

• What type of substance turns litmus paper red?

• How does an indicator show the acidity or alkalinity of solutions?

• What pH values represent alkaline solutions?

• What happens in all chemical reactions?

• What kind of reaction occurs between an acid and an alkali?

• What do you call a solution that is neither acidic nor alkaline.

• Give the name and formula of a common laboratory acid.

• Which ion is in excess in all acidic solutions?

• Which ion is in excess in all alkaline solutions?

• What scale is used for measuring acidic and alkaline properties?

• Name three examples of acid/alkali indicators apart from universal indicator.

• What would you use to measure pH to one decimal place?

• What pH values are acidic?

• What colour is phenolphthalein in a solution with a pH of 2?

• What happens to the pH as the H+ ion concentration increases?

• If a solution has the same concentration of hydrogen ions as hydroxide ions, how is it described?

• If 2 g of salt is dissolved in 250 cm3 of solution, what is its concentration in g dm–3?

• What word describes a solution that contains a large amount of solute in a small volume of solvent?

• How can a solution be made more dilute?

• If 24 g of acid is dissolved in 600 cm3 of solution, what is its concentration in g dm–3?

• What happens when strong acid molecules dissolve in water?