C4 Chemical Changes

Question 1

Ph scale goes from 0-14

Answer 1

Lower ph of a solution the more acidic
Higher ph of a solution the more alkaline it is

Question 2

You can measure the ph of a solution

Answer 2

An indicator is a dye that changes colour depending on whether its above or below a certain PH

Question 3

Acids and bases Neutralise each other

Answer 3

When acids dissolve in water, they form solutions with a PH less than 7

Question 4

Reactions of acids

Answer 4

Metal oxides and metal hydroxides are Bases

Question 5

Metal oxides ans hydroxides

Answer 5

They react with acids in neutralisation reactions to form a salt and water

Question 6

The reactivity series and extracting metals

Answer 6

You can place metals in order of reactivity

Question 7

The Reactivity series-How easily a metal reacts

Answer 7

The reactivity series lists metals in order of how reactive they are.
-metals react to form positive ions
-

Question 8

Very reactive metals

Answer 8

Potassium,sodium,lithium and calcium all react explosively with acids

Question 9

Less reactive metals

Answer 9

Magnesium,zinc and iron react less violently