1.

Calculate number of ions present in 0.01 mole of CaSO4.

Answer»

0.01 molal solution of CaSO4 means, 0.01 mole of CaSO4 present in 1000g of solvent.

\(\because\) CaSO4 in solution dissociate into ca+2 & SO4-2 ions.

\(\therefore \) Number of moles of ions in 1000g of solvent = 0.02 mol.

\(\because\) 1 mole ions contain = 6.02 x 1023 ions.

\(\therefore \) 0.02 mole ions contain = 6.02 x 1023 x 0.02 ion

= 1.20 x 1022 ions

Hence, 1.2 x 1022 ions are present in 1000g of solvent.



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