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Boiling point of water at 750 mm is 99.63^@ C. How much of sucrose is to be added to 500 g of water so that it boils at 100^@ C. (K_b =0.052 )

Answer»

Solution :`DELTA T_b = 100-99.63 =0.37K`
`K_b= 0.52 `
` M_B ` for `(C_(12) H_(22) O_(11)) =342 `
`W_A=500 g`
` W_B=(Delta T_b xxM_b xx W_A )/(1000 xx K_b)`
`=(0.37 xx342 xx 500 )/(1000 xx 0.52 )`
`=( 0.37 xx 171 )/( 0.52 )`
`= 121.7`g


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