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 + H2O
3)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 .