C3.3.2 - Smelly problem (Litmus, UI and Neutralisation) Flashcards Preview

SHHS - Science - C3.3 Detection - Year 9 > C3.3.2 - Smelly problem (Litmus, UI and Neutralisation) > Flashcards

Flashcards in C3.3.2 - Smelly problem (Litmus, UI and Neutralisation) Deck (21)
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1

A weak acid is pH ___ to ____

4 to 6

2

A solution turns blue litmus paper red and red litmus paper stays red it is an...

acid

3

If an acid is added to an alkali the pH will go _____

down

4

pH 8-14 are all...

alkali

5

A solution turns red litmus paper blue and blue litmus paper stays blue it is an...

alkali

6

A strong acid is pH ___ to ___

1-3

7

the colour chart used to tell us what the colour of universal indicator mean is called the...

pH scale

8

HIGHER: How do we name a salt that is produced in a neutralisation reaction.

e.g.

ethanoic acid + sodium hydroxide --> _______ + water

ethanoic acid + sodium hydroxide --> ______ + water

Salt name is made from 2 words.

First word is the metal.

Second word is part of the acid name with ate at the end.

e.g.

Sodium Ethanoate

9

The reaction between an acid and an alkali is called a...

neutralisation reaction

10

pH 7 is...

neutral

11

What is the equation for reacting an acid with an alkali?

Acid + Alkali --> Salt + Water

12

A strong alkali is pH ____ to ___

11-14

13

Red litmus paper stays red and blue litmus paper stays blue. The solution is ...

neutral

14

Why is universal indicator more useful than litmus paper?

It tells us the strength of an acid or alkali.

15

pH 1-6 are...

Acids

16

If an alkali is added to an acid the pH will go _____

up

17

Strong acids an alkalis can chemically burn the skin. We say that they are...

corrosive

18

Salts always end in which 3 letters?

-ate

e.g. copper sulfate

19

A weak alkali is pH ___ to ____

8 to 10

20

Name 2 indicators that can be used to identify acids and alkalis.

Litmus paper

Universal Indicator

21

How can an acid spill be disposed of?

Add an alkali to neutralise it into water and a salt.

Put sand on it and clear the sand.

Have a chemical disposal company deal with it.