State what information is provided by the formula of calcium hydroxide Ca( OH) 2.

Give the formula for: a) hydrogen chloride

b) ammonia c) carbon monoxide d) nitric acid e) nitrous oxide f) nitrogen dioxide g) nitrogen h) sulphur

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Solution

Calcium hydroxide is an ionic compound, so its formula describes the ratio of cations to anions. In particular, Ca(OH)2 means that there is 1 calcium ion (Ca^2+) for every 2 hydroxide ions (OH-). It does NOT mean that there is exactly 1 calcium and 2 hydroxides. That is just the ratio between the two ions.

a HCl
b NH3
c CO
d HNO3
e N20
f N02
g N2
h S8

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State what information is provided by the formula of calcium hydroxide Ca( OH) 2. Give the formula for: a) hydrogen chloride b) ammonia c) carbon monoxide d) nitric acid e) nitrous oxide f) nitrogen dioxide g) nitrogen h) sulphur

State what information is provided by the formula of calcium hydroxide Ca( OH) 2.

Give the formula for: a) hydrogen chloride

b) ammonia c) carbon monoxide d) nitric acid e) nitrous oxide f) nitrogen dioxide g) nitrogen h) sulphur