Equations

Question 1

What is a hydrocarbon?

Answer 1

A hydrocarbon is made up of ONLY hydrogen and carbon.

Question 2

what are the hydrocarbons? That you have learnt.

Answer 2

Methane
Ethane
Propane
Butane
pentane

Question 3

What are dilute acids?

Answer 3

Acids that contain more water

Question 4

What are concentrated acids?

Answer 4

They are acids that have less water and more acids, They are very corrosive and can destroy your skin.

Question 5

weak acids release…

Answer 5

less hydrogen ions.

Question 6

strong acids release…

Answer 6

all hydrogen ions.

Question 7

bases are… feel… react with… and … them what are some examples of them?

Answer 7

are bitter, feel soft and soapy, react with acids and neutralise them.

Copper oxide and calcium carbonate are examples.

Question 8

Alkalis..

Answer 8

are a base that dissolve in water

examples are..
Sodium hydroxide
Potassium hydroxide

Question 9

bases

Answer 9

can react with alkalis and acids
Theyre usually metal oxides metal hydroxides metal carbonates or metal hydrogen carbonates. Many bases are insoluble, if a base does dissolve in water we call it an alkali

Question 10

pH 1-6 is..

Answer 10

an acid

Question 11

pH7 is..

Answer 11

neautral

Question 12

pH 8-14 is..

Answer 12

alkali

Question 13

the closer you are to pH7 the… the…

Answer 13

weaker… acid or alkali is

Question 14

ret litmus turns..

Answer 14

stays red when its an acid or neutral and turns blue in alkalis

Question 15

blue litmus turns..

Answer 15

red in acids and stays blue in alkalis and acids.

Question 16

methyle orange turns..

Answer 16

red in acids and yellow in neutral or alkalis

Question 17

universal indicator turns..

Answer 17

green in neautral, red orange or yellow in acids and blue or purple in alkaline.

Question 18

to make a strong acid pH 7 add..

Answer 18

strong base

Question 19

to make weak acid pH 7 add..

Answer 19

a weak base