1. Chapter 7 Solutions

2. Question Why is 24K gold softer and more yellow than 10K or 18K? – – Why can’t planes be made with Mg metal?

3. Other solutions Do fillings ‘leak’? – Why add He to scuba tanks? –

4. Terms Solute Solvent Miscible Suspension Solvation Hydration

5. Nine Solutions

6. Why does NaCl dissolve in water?

7. Why does Sugar dissolve in water?

8. Solubility Saturated Unsaturated Supersaturated Rules p. 177

9. Concentration Generally: –

10. Concentration % Composition – – – Molarity

11. % w/w - preparation Convert to 100. g How would you prepare 200. g of a 5.50% w/w solution of sugar?

12. % w/w - mass How many grams of phenol are in 2.5 g of a 0.20% w/w solution?

13. % w/w – volume How many grams of 6.30% w/w solution of CaCl 2 are needed to obtain 27.6 g of CaCl 2 ?