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Daily EQ:What is a solution? Warm-up 11/29/10 Half-life- the time required for half of a substance to decay How many grams of a 50 g sample of Thorium – 234 would remain after 20 days? (Half-life is 5 days) Bean Lab Due Wednesday 12/1

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11/29/10 Things to do today 1. Review purpose of Bean Lab. Any questions about graphs? Need graph paper? (due Wednesday) 3. Return quiz, any questions on quiz

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Notes Define the following solution- solution- solvent- solvent- solute- solute- solubility- solubility- solubility curve- solubility curve-

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Solubility curve 11/29/10

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Unit EQ:What is solubility? Daily EQ:What is a solubility curve? Warm-up 12/3/10 1)What are the solutes in a can of soda? What is the solvent?

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More notes Define the following saturated- saturated- supersaturated- supersaturated- unsaturated- unsaturated- hold the maximum amount of solute per solvent. On the curve hold more than maximum amount of solute per solvent- above the curve less than the max –under the curve

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1) How much potassium nitrate can dissolve in 100 grams of water at 40 o C ? b)How much sodium chloride can dissolve in 18 grams of water at 55 o C ? 3) Which has the lowest solubility at 0 o C. NH 3 KCl, NaNO 3 NH 3 KCl, NaNO 3 d) Which can make a more concentrated solution at 15 o C? NH 4 Cl or NaCl 5) If 30 grams of sodium nitrate dissolve in 50 grams of water at 30 o C, is the solution saturate, supersaturate or unsaturated?. f) How many grams of a 18 g sample of Thorium – 234 would remain after 45 days? (Half-life is 5 days) Ticket out the Door

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Unit EQ:What is solubility? Daily EQ:What is a solubility curve? Warm-up 10/28/09

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Unit EQ:What is solubility? Daily EQ:What is a solubility curve? Warm-up 10/28/09 1) How much potassium nitrate can dissolve in 100 grams of water at 40 o C ? 2) How much sodium chloride can dissolve in 18 grams of water at 38 o C ?

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