Percent of solute: Calculate the mass of calcium suphate `(CaSO_(4))` contained in `200g` of a `6.00%` solution of `CaSO_(4)` Strategy: Percent infromation means the solution contains `6.00g` fo `CaSO_(4)` per `100g` of solution. To solve the problem, we can use either unitary method or Eq (1.16) or construct a unit factor.

Percent of solute: Calculate the mass of calcium suphate `(CaSO_(4))`

1.	Percent of solute: Calculate the mass of calcium suphate `(CaSO_(4))` contained in `200g` of a `6.00%` solution of `CaSO_(4)` Strategy: Percent infromation means the solution contains `6.00g` fo `CaSO_(4)` per `100g` of solution. To solve the problem, we can use either unitary method or Eq (1.16) or construct a unit factor.
Answer» (i) Unitary method: `100g` solution contains `6.00g CaSO_(4)` `1g` solution contains `(6.00)/(100)g CaSO_(4)` `200g` solution contains `(6.00)/(100) xx 200g CaSO_(4)` `= 12.0g CaSO_(4)` (ii) Using Eq (1.16) Percent solute `= ("Mass of solute")/("Mass of solution") xx100%` `:.` Mass of solute `= (("Percent solute") xx ("Mass of solution"))/(100%)` `= ((6.00%) (200g))/(100%) = 120g CaSO_(4)` (iii) Factor-label method `?g CaSO_(4) = 200g "soln" xx (6.00g CaSO_(4))/(100g "soln".) = 12.0g CaSO_(4)`

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