Question

(a)At what pH in the mouth is tooth decay faster and why? (1M)

(b)Explain the formation of ionic compound Calcium oxide (CaO) with

electron dot structure. (2M)

(c)We can store copper sulphate solution in a silver vessel but not silver

nitrate solution in a copper vessel. why?​

Answer 1

Answer:

(a) Below 5.5 pH tooth decay starts

(c) Because copper is reactive and it would react with the solution