1.

How many millilitres of 6.0 M hydrochloricacid should be used to prepare 150 mL of a solution which is 0.30 M in hydrogen ion

Answer»

`3.0`
7.5
9.3
30

SOLUTION :`M_(1) = 6.0 M` of HCL , `V_(1) = ?`
`M_(2) = 0.30 M` is `H^(+)` CONCENTRATION in solution.
`V_(2) = 150 ml` of solution.
`M_(1)V_(1) = M_(2)V_(2), 6.0 xx V_(1) = 0.30 xx 150`
`V_(1) = (0.30 xx 150)/(6) = 7.5 ml`.


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