Question

If an experiment calls for 0.200mole acetic acid (Hc2H3O2)how many grams of glacial acetic acid do we need?

Answer 1

Molar mass:-

`\\ \sf\longmapsto HC_2H_3O_2`

`\\ \sf\longmapsto 1u+2(12u)+3(1u)+2(16u)`

`\\ \sf\longmapsto 1u+24u+3u+48u`

`\\ \sf\longmapsto 28u+48u`

`\\ \sf\longmapsto 76u`

`\\ \sf\longmapsto 76g/mol`

• No of moles=0.2mol
• Given mass=?

`\\ \sf\longmapsto No\:of\;moles=(Given\:Mass)/(Molar\:Mass)`

`\\ \sf\longmapsto 0.2=(Given\:mass)/(76)`

`\\ \sf\longmapsto Given\:Mass=0.2* 76`

`\\ \sf\longmapsto Given\:Mass=1.52g`