A beaker contains a 25% by mass solution of aqueous propylene glycol. If a chemist gently heats the beaker in order to evaporate all the water away without evaporating any of the propylene glycol, all of the pure propylene glycol should remain in the beaker.
1. What mass of pure propylene glycol can be recovered from 454 g of 25% solution?
2. What mass of 25% solution should be heated in order to obtain 5.0 of pure propylene glycol?
3. What mass of water will be removed when 40.0g of 25% solution is heated?
4. What mass of water will be removed when enough 25% solution is heated up to produce 2.00g of pure propylene glycol?