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Topic 4 Acids and alkalis

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Total cards: 24•Content version: v4•Public deck•Updated: 8/1/2026

Card preview (24)

#1
Front (Question)

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

Back (Answer)

corrosive

#2
Front (Question)

• Name an acidic solution found in the kitchen.

Back (Answer)

vinegar or fruit juice, etc.

#3
Front (Question)

• Name an alkaline solution used in the kitchen.

Back (Answer)

bleach or oven cleaner or soap, etc.

#4
Front (Question)

• What type of substance turns litmus paper red?

Back (Answer)

acid

#5
Front (Question)

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

Back (Answer)

by changing colour

#6
Front (Question)

• What pH values represent alkaline solutions?

Back (Answer)

above 7 or 8 to 14

#7
Front (Question)

• What happens in all chemical reactions?

Back (Answer)

new substances are formed

#8
Front (Question)

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

Back (Answer)

neutralisation

#9
Front (Question)

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

Back (Answer)

neutral

#10
Front (Question)

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

Back (Answer)

hydrochloric acid (HCl) or nitric acid (HNO3) or sulfuric acid (H2SO4), etc.

#11
Front (Question)

• Which ion is in excess in all acidic solutions?

Back (Answer)

hydrogen ions or H+ ions

#12
Front (Question)

• Which ion is in excess in all alkaline solutions?

Back (Answer)

hydroxide ions or OH– ions

#13
Front (Question)

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

Back (Answer)

the pH scale

#14
Front (Question)

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

Back (Answer)

litmus, methyl orange and phenolphthalein

#15
Front (Question)

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

Back (Answer)

a pH meter

#16
Front (Question)

• What pH values are acidic?

Back (Answer)

below 7

#17
Front (Question)

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

Back (Answer)

colourless

#18
Front (Question)

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

Back (Answer)

it decreases

#19
Front (Question)

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

Back (Answer)

neutral or pH = 7

#20
Front (Question)

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

Back (Answer)

8 g dm–3

#21
Front (Question)

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

Back (Answer)

concentrated

#22
Front (Question)

• How can a solution be made more dilute?

Back (Answer)

by adding solvent/water

#23
Front (Question)

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

Back (Answer)

40 g dm–3

#24
Front (Question)

• What happens when strong acid molecules dissolve in water?

Back (Answer)

they dissociate completely into ions