Question

What is molarity of 47.0 g KCl dissolved in enough water to give 375 mL of solution?

Answer 1

This question provides us –

• Weight of
  `\bf KCl` is = 47 g
• Volume, V = 375 mL

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• Molar Mass of
  `\bf KCl` –

`\qquad`
`\twoheadrightarrow\bf 39.0983 * 35.453`

`\qquad`
`\twoheadrightarrow\bf 74.5513`

Using formula –

`\qquad`
`\purple{\twoheadrightarrow\bf Molarity _((Solution)) = ( W* 1000)/(MV)}`

`\qquad`
`\twoheadrightarrow\bf Molarity _((Solution)) = ( 47 * 1000)/(74.5513* 375)`

`\qquad`
`\twoheadrightarrow\bf Molarity _((Solution)) = (47000)/(27956.7375)`

`\qquad`
`\twoheadrightarrow\bf Molarity _((Solution)) = \cancel{(47000)/(27956.7375)}`

`\qquad`
`\twoheadrightarrow\bf Molarity _((Solution)) = 1.68117M`

`\qquad`
`\pink{\twoheadrightarrow\bf Molarity _((Solution)) = 1.7M}`

• Henceforth, Molarity of the solution is = 1.7M

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