Составьте молекулярное и ионные уравнения гидролиза: а) карбоната натрия б) хлорида цинка

Помогите пожалуйста с упражнением!

Задание:Read the text about Baby Elephant.Complete the sentences.

 They ...(come) to Mrs Tiger's shop.There ...(be) a lot of T-shirts and shorts there."Good morning,Mrs Tiger," ...(say) Father Elephant. "Have you got a T-shirt and shorts for my Baby Elephant?" ...(ask) Father Elephant. But wait a little,and my little Tigers will make him a nice big T-shirt and shorts," ...(answer)Mrs Tiger. The little Tigers ...(make) a nice new blue T-shirt and white shorts for Baby Elephant.Then father Elephant ...(put) them on Baby Elephant. Baby Elephant ...(be) very happy,and he ...(say) 

Страдательный залог English (to speak) in many countries. Coins (to collect) by numismatists. My friend (to interest) in music. Last year this computer game (to play) by more people than now. Look, a new monument (to build) here! Very important information (to lose) before you saved it. It (to do) two days ago. Now your document is OK. … all the mistakes (to correct) by you personally? Sometimes hobbies (to choose) by parents, not by children themselves. These photos (to take) when we were on holiday last year.

в пакете лежали сливы.  сначала из пакета взяли 50% всех слив, а затем 50% остатка. сколько было в пакете первоначально, если в пакете было 9 слив?