Question

1) when kl-solution is added to a solution of lead (ll)- nitrate (pb(No3)2) in a test tube , a precipitate is formed a- what is the colour of this precipitate ?b- name the compound precipiitate c- write the balance chemical equation for this reaction d- what type of reaction is this ?2)balance the following chemical equation ;HNO3 + Ca(OH)2 ------> Ca(NO3)2 + H2O3)why does the colour of copper sulphate solution change when an iron nail is dipped in it ?4) when zinc granules are added to dil.sulphuric acid, a gas is evolved . write the name of the gas and reaction taking place .

Answer 1

a) yellow
b) lead nitrate
d) precipitation reaction
4) h2 gas
Zn+ H2SO4---->ZnSO4+H2