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Pvnrt, etc.

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8. Ca(OH)2 is not very soluble, but its solution is used a 'lime water'. CrCl3 is soluble. The formation of BaSO4 precipitate is used as the test for sulphate ions.

9. Calcium chloride is CaCl2, so 0.450 M CaCl2 has 0.900 M chloride ions. 0.25 L of this solution would contain 0.25 x 0.9 moles of chloride...

10. Using P1V1/T1 = P2V2/T2 ...

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