Question

Lution: What is the molarity of 245 g of H, SO4 dissolved in 1.00 L of solution?

Answer 1

Molar mass of H2SO4:-

`\\ \large\sf\longmapsto H_2SO_4`

`\\ \large\sf\longmapsto 2(1u)+32u+4(16u)`

`\\ \large\sf\longmapsto 2u+32u+64u`

`\\ \large\sf\longmapsto 98u`

`\\ \large\sf\longmapsto 98g/mol`

• Given mass=245g

`\boxed{\sf No\:of\:moles=(Given\:mass)/(Molar\:Mass)}`

`\\ \large\sf\longmapsto No\:of\:moles=(245)/(98)`

`\\ \large\sf\longmapsto No\:of\:moles=2.5mol`

Now

`\boxed{\sf Molarity=(Moles\:of\:solute)/(Volume\:of\:solution\;in\;L)}`

`\\ \large\sf\longmapsto Molarity=(2.5)/(1)`

`\\ \large\sf\longmapsto Molarity=2.5M`