Question

Which ones are soluble in water?
NaOH
Fe2S
MgSO4
PbCI2
MgCO3

Answer 1

Hi!
Welcome to OpenStudy

Answer 2

You probably didn't notice but you posted your chemistry question in Biology section.

Answer 3

NaOH (soluble)
Fe2S (soluble)
MgSO4 (soluble)
PbCl2 (INSOLUBLE)
MgCO3 (soluble)

Answer 4

HINT
ALL SODIUM COMPOUNDS ARE SOLUBLE.
ALL SULFATE'S ARE SOLUBLE (EXCEPT CALCIUM , BARIUM AND Lead SULFATE,S)
ALL CHLORIDE'S ARE SOLUBLE (EXCEPT LEAD AND SILVER CHLORIDE)

Answer 5

This would be hard to answer without a fundamental understanding of chemical structure.
I'm sure you're fmailiar with the term "like dissolves like"?

Answer 6

Polar and polar

Answer 7

Hi..um sorry about the last one..it's insoluble because all carbonate compounds are insoluble.