a 6.90 molar sol of koh in water contains 30 % by weight of koh.find density of solution
richa aggarwal , 13 Years ago
Grade 12
Physical Chemistry> solutions...
1 Answers
sushant singh
Last Activity: 13 Years ago
hey richa,
please check the solution...
to calculate the density of koh solution...
A 6.90 M solution contains 6.90 mol of KOH in 1000 cm3 of the solution.
Mass of 6.90 mol of KOH = 690 H 56 = 386.4 g
A 30% solution contains 30g of KOH present in = 100 g of solution
∴ 386.4 g of KOH is present in = (100 x 386.4 g) / 30 = 1288 g of solutions
Density of KOH solution = (Mass / volume) = 1288 / 1000 =1.288 g/cm-3
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