Reactions Revision

Combustion

100

What 3 things are required to make a fire? (Fire triangle)

Oxygen, fuel and heat

200

What is a combustion reaction?

Fuel reacts with oxygen to produce heat, water and carbon dioxide

Precipitation

100

Is sodium carbonate soluble or insoluble? How do you know?

Soluble, all carbonates are insoluble except for sodium carbonate (and potassium carbonate)

200

What is a precipitate and what does it look like in a reaction?

Precipitate is the produce that is insoluble. It looks like a solid in the test tube.

Neutralization

100

What is a chemical called with lots of H+ ions?

What is a chemical called with lots of OH- ions?

H+ ions = acid

OH- ions = base

200

What color would each of these chemicals make if added to universal indicator?

a) pH = 2

b) pH = 7

c) pH = 13

a) red (acid)

b) green (neutral)

c) blue/purple (base)

Displacement

100

Complete the reaction...

Fe + CuSO₄ -> ________ + _________

Fe + CuSO₄ -> FeSO₄ + Cu

200

Fill in the blanks for this reaction...

Zn + CuSO4 -> ZnSO4 + Cu

_____ is displacing ______ because it is more ______.

Zinc is displacing Copper because it is more reactive.