A6. 9M soln. Of koh in water contains 30%by mass of koh. Calculate density of koh solution
Answer (1)
Student Expert
17th Feb, 2019
Hello Aman,
Here is the solution -
A 6.90M solution contains 6.90 mol KOH in 1000 cm3 of the solution -
Mass of 6.90 mol of KOH = 6.90×56 = 386.4g
A 30% solution contains 30g of KOH present in 100g of the solution -
So, 386.4 g of KOH is present in = 100×386.430 = 1288g of solution
Hence, the density of KOH solution = Mass / Volume
= 1288g1000cm3
= 1.288gcm−3
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