Question

HELP NEEDED!

Answer 1

Calculate the mass of potassium hydroxide which must be dissolved in 0.25 dm3
of water to make a solution whose concentration is 0.1 mol / dm3.
Show your working and state the unit.

Answer 2

@Zale101

Answer 3

@chmvijay Please help this person
you're super cool with chemistry

Answer 4

@chmvijay

Answer 5

KOH molar mass?

Answer 6

(relative formula mass =) 39 + 16 + 1 or 56;

Answer 7

56 g of KOH in 1000 ml gives 1M solution
56/4 g of KOH in 1000/4 ml gives 1M solution
14 g of KOH in 250 ml gives 1M solution
14/10 gram of KOH in 250 ml gives 1/10 m solution
1.4 gram of KOH in 250ml gives 0.1M solution

Answer 8

Thanks a lot!

Answer 9

yw:)