C2 - Acids And Alkalis Flashcards Preview

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Flashcards in C2 - Acids And Alkalis Deck (21):
1

What pH does the strongest acid have?

0.

2

What pH does the strongest alkali have?

14.

3

What is an indicator?

A dye that changes colour based on pH.

4

What is universal indicator?

A combination of dyes that gives the pH scale.

5

What is universal indicator useful for?

Estimating the pH of a solution.

6

What is an acid?

A substance with a pH of less than 7.

7

What ions do acids form in water?

H+.

8

What is a base?

A substance with a pH of greater than 7.

9

What is an alkali?

A base that dissolves in water.

10

What ions do alkalis form in water?

OH-.

11

What is the reaction between acids & bases?

Neutralisation.

12

What is the word equation for the reaction between acids & bases?

acid + base -> salt + water.

13

What is the ionic equation for the reaction between an acid & a base?

H+ + OH- -> H2O.

14

What pH will the products of a neutralisation reaction have?

7.

15

What colour will universal indicator go at the end of a neutralisation reaction?

Green.

16

What does (s) mean?

Solid.

17

What does (l) mean?

Liquid.

18

What does (g) mean?

Gas.

19

What does (aq) mean?

Aqueous: dissolved in water.

20

What is the pH scale?

A measure of how acidic or alkaline a solution is.

21

Name an everyday use of neutralisation.

Indigestion tablets.