YEAR 10 REVIEW

Material World – Acids and Materials

1. All matter is made up of atoms. Label the parts of the atom.

1. Nucleus2. Proton 3. Neutron4. Electron5. Shell

Hint: the red particles are positive

A

B

C

D

E

ECADB

2. Fill in the missing symbols and names of the elements.

Hydrogen ChlorineHe K

Lithium SiliconBeryllium Sodium

B MgCarbon Fluorine

N OAluminium Sulfur

3. Work out what type and how many atoms are in a compound by looking at its formula.

4

H2O = 2 x H and 1 x O CO2 2FeS C6H12O6 3O2 MgCl2 Ca(OH)2

= 1 X C and 2 X O = 3

= 2 X Fe and S X O = 2

= 6 X C and 12 X O and H X 12= 24= 3 X 2 X O = 6

= 1 X Mg and 2 X Cl = 3

= 1 X Ca and 2 X O and 2 X H = 5

4. Complete the following word equations. Acid + __________ salt + water Acid + __________ salt + water + carbon

dioxide Acid + __________ salt + hydrogen gas

Hint: use metal, carbonate, and base

Metal

Carbonate

Base

6. Name 3 acids and 3 bases.AcidsLemon juiceBile in stomachVinegar

BasesClothes washing powderBaking sodaSoap

7. Where would you find acids, bases and water on the pH scale? Strong acids – pH = 0

Weak acids – pH = 6 Water – pH = 7 Weak bases – pH = 8

Strong bases – pH = 14

8. Match the test with the gas it tests for. 1. Hydrogen2. Oxygen3. Carbon dioxide

A. Limewater will change from clear to white; a lit splint will go out

B. A lit splint blown out will relightC. ‘pop’ test – a flame goes out

with a ‘pop’

CB

A

9. Give a use and a reason for that use for each metal listed.

Metal Use ReasonGoldCopperMercuryChromium

Aluminium

10. What is needed for complete combustion? Lots of oxygen

11. What are the products of complete combustion? Incomplete combustion?

Hint: What colour forms on the bottom of a beaker if it is held over a yellow flame?