C2.6 Acids, bases and salts Flashcards Preview

Core & Additional Science 11R/Ca4 > C2.6 Acids, bases and salts > Flashcards

Flashcards in C2.6 Acids, bases and salts Deck (19)
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1

What is an acid?

A substance with a pH less than 7.

2

What is an alkali?

A base which is soluble in water.

3

What is a base?

A substance which has a pH higher than 7.

4

Which ion is found in acids?

Hydrogen ions (H+ ions)

5

Which ion is found in alkalis?

Hydroxide ions (OH- ions)

6

What is the formula of hydrochloric acid?

HCl

7

What is the formula of sulfuric acid?

H2SO4

8

What is the formula of nitric acid?

HNO3

9

What is the formula of sodium hydroxide?

NaOH

10

What is the formula of sodium oxide?

Na2O

11

What type of substance is sodium oxide?

A base

12

Complete the following general equation:

acid + metal oxide (base) →

salt + water

13

Complete the following equation:

copper oxide + nitric acid →

copper nitrate + water

14

Which acid do you use to make nitrate salts?

Nitric acid

15

Which acids do you use to make sulfate salts?

Sulfuric acid

16

Which acid to you use to make chloride salts?

Hydrochloric acid

17

Why do we add an excess of base when using an insouble base?

To ensure that all the acid has reacted.

18

How do we remove the excess solid base?

Filtration

19

What do we need to add to an acid and alkali to identify when they have neutralised each other?

An indicator