10,000,000
ph=0
battery acid
concentrated hydrofluoric acid
1,000,000
ph=1
hydrochloric acid secreted
by stomach lining
100,000
ph=2
lemon juice
gastric acid
vinegar
10,000
ph=3
grapefruit
orange juice
soda
1,000
ph=4
acid rain
tomato juice
100
ph=5
soft drinking water
black coffee
10
ph=6
urine
saliva
1
ph=7
pure water
1/10
ph=8
sea water
1/100
ph=9
baking soda
1/1,000
ph=10
great salt lake
milk of magnesia
1/10,000
ph=11
ammonia solution
1/100,000
ph=12
soapy water
1/1,000,000
ph=13
bleaches
oven cleaner
1/10,000,000
ph=14
liquid drain cleaner

many common household substances may be classified as acids or bases. according to the ph scale,

a)
baking soda is a weak base while bleach is a strong base.

b)
coffee is a weak acid while drain cleaner is a strong acid.

c)
oven cleaner is a weak acid while battery acid is a strong acid.

d)
soft drinking water is a weak base while soapy water is a strong base.