The Chemical Basis of Life Study Guide

1 you fill a glass with water place a teaspoon of

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Unformatted text preview: fill a glass with water, place a teaspoon of salt (NaCl) in it, and note that the salt "disappears". You then let the glass sit until the water evaporates, and the salt "reappears". Explain the apparent disappearance and reappearance of the salt molecules. B . When solution A and B are combined, no color change takes place. However, when substance D is added to the combined solution, it turns red. Later, the exact amount of substance D that was added is recovered from the solution. 3. Given that blood is buffered by these reactions: CO2 + H2O H2CO3 H+ + HCO3- 2. Two substances, A and B, can combine to form substance C: ↔ A + B ➔C Substance A and B each dissolve in water to form a colorless solution, whereas substance C is a red solution. Using this information, explain these two experiments. A. When solutions A and B are combined, no color change takes place. However, when the combined solution is heated, it turns red. ↔ What happens to blood pH if a person holds his (her) breath? 4. Suppose you have two substances and you know one is a carbohydrate and one is a lipid. How could you tell which one was the carbohydrate and which one was the lipid, if you had available the materials found in a bathroom? (Hint: medicine cabinet). 11...
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