Can you help me convert compounds with water molecules?

[~angel~]

I'm having a lot of trouble with some of these questions. Please help

Converting manganse nitrate-6-water to manganese sulfate-4-water

Converting calcium acetate-1-water to calcium nitrate-4-water.

It's the "water" bits that confuse me. I just need a couple of ionic equations to show the conversion (like dissolving it in water, etc).

Thank you.

 

[dextercioby]

Converting,like reacting with certain compounds?

For example

$$Mn\left(NO_{3}\right)_{2}\cdot 6H_{2}O+H_{2}SO_{4}\rightarrow MnSO_{4}+2HNO_{3}+6H_{2}O$$

How do you know that by recrystalization of the reaction products u'd get $MnSO_{4}\cdot 4H_{2}O$...?


Daniel.

 

[dextercioby]

As for the second

$$Ca(CH_{3}-COO)_{2}\cdot H_{2}O+2HNO_{3}\rightarrow Ca\left(NO_{3}\right)_{2}+2CH_{3}-COOH$$

Again,by recrystalization,how do u know it's going to be a $Ca\left(NO_{3}\right)_{2}\cdot 4H_{2}O$ ?



Daniel.

 

[~angel~]

That's exactly what I'm having trouble with. Thanks for your help.

 

[dextercioby]

Well,those acids must be in solution,u can see that,doing the second one stoichiometrically,u won't get that 4 molecules of water.


Daniel.