acids and bases

Question 1

properties of acids

Answer 1

coarse to touch 
sour to taste
ph <7
Neutralise bases
Strong acids are corrosive

Question 2

5 properties of bases

Answer 2

Bitter to taste
Soapy to the touch
Neutralise acids
Strong bases are corrosive
pH above 7

Question 3

colours on pH scale and what they represent

Answer 3

red - strong acid
orange and yellow - weak acid
green - neutral
blue - weak base
purple - strong base

Question 4

acids found in everyday life

Answer 4

Orange juice
Vinegar
Lemon juice
Citric acid
Gastric acid (stomach acid)

Question 5

bases found in everyday life

Answer 5

baking soda
Soaps
Bleach
Ammonia solution

Question 6

neutral substances

Answer 6

Water (pure)
Table salt solution
Cooking oil

Question 7

Strong acids

Answer 7

HCl - Hydrochloric acid
H2SO4 - Sulphuric acid
HNO3 - Nitric acid

Question 8

Weak acids

Answer 8

CH3COOH - Acetic acid
H2CO3 - Carbonic acid
H2SO3 - Sulphurous acid
H3PO4 - Phosphoric acid

Question 9

Strong bases

Answer 9

NaOH - sodium hydroxide
KOH - Potassium hydroxide
LiOH - lithium hydroxide

Question 10

weak bases

Answer 10

NH3 - Ammonia
Ca(OH)2 - calcium hydroxide
CaCO3. - Calcium carbonate
NaHCO3 - Sodium bicarbonate

Question 11

indicators

Answer 11

methyl orange
phenolphthalein
bromthymol blue
litmus paper

Question 12

Reactions with acids

Answer 12

Acid + Metal Hydroxide(base) → Salt + Water
Acid + Metal Oxide (base) → Salt + Water
Acid + Metal Carbonate(base)→ Salt + Water + Carbon Dioxide
Acid + Metal → Salt + Hydrogen