Question

how much volume of 18 m and 4 m sulphuric acid must be mixed to get 1 litre of 8 m sulphuric​

Answer 1

Answer:

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Question

How much volume of 18M & 4M sulphuric acid must be mixed to get 1litre of an 8M solution of sulphuric acid?

Solution

Let us take = x litres of 18 M sulphuric and y litres of 4M solution.

Now, finally we need 1 litre of 8M solution

So, x litre + y litre = L litre

Or x + y = 1 - (i)

and,

18

M

×

x

l

i

t

r

e

+

4

M

×

y

l

i

t

r

e

s

=

8

M

×

1

l

i

i

t

r

e

⇒

18

x

+

4

y

=

8

-(ii)

Solve (i) & (ii)

from (i),

x

+

y

=

1

⇒

4

x

+

4

y

=

4

(iii)

(ii) - (iii) 18x + 4y = 8

4

x

+

4

y

=

4

14

x

=

4

x

=

4

14

=

2

7

x

+

y

=

1

⇒

y

=

1

−

2

7

=

5

7

So, take 47 litre of 18 M &

5

7

litre of 4M