Chemistry, asked by saksham2332, 1 year ago

the density of 10% by mass KCl sol. in water is 1.06gcm^-3. Its molarity ??

Answers

Answered by Jhani

Molarity = 10d% / Molar mass

= 10 × 1.06 × 10 / 66.5

= 1.6 M

Hope it helps!

saksham2332: sorry bt.... not in the option

Jhani: What is the nearest option?

Jhani: No other answer is possible

Jhani: Is it 0.159M?

saksham2332: options are 1--- 1.489M 2--- 1.420M. 3--- 1.420molkg^-1. 4 ----1.489mol kg^-1

saksham2332: for 100gm of solution

V=m/d=100/1.06=94.33ml

n of KCl in 100gm

n=10/74.5=0.134mol

molarity=(n/v) *1000

=0.134/94.33=1.42M

saksham2332: got the answer

saksham2332: br is for line break

Jhani: This is also correct method but formula gives answer 1.6...

Answered by darshanraj1

1.6m is the molarity

saksham2332: not in the options

darshanraj1: sorry by mistake wrong type ho gya

darshanraj1: it's answer is 1.6m

darshanraj1: ok

saksham2332: no

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