Chapter 7 Solutions

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

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

Terms Solute Solvent Miscible Suspension Solvation Hydration

Nine Solutions

Why does NaCl dissolve in water?

Why does Sugar dissolve in water?

Solubility Saturated Unsaturated Supersaturated Rules p. 177

Concentration Generally: –

Concentration % Composition – – – Molarity

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

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

% 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 ?