Question

Select the best answer to each question below, and place the letter of that answer on the line. Each question is worth 4 points 1.A test tube contains 1 mL of water and 1 ml of heptanol. Which is the top layser A. water B. heptanol C. There are no layers; they are miscible with one another D. It is impossible to predict 2.12 preferentially dissolves in octanol rather than water because: A. I2 and octanol are both nonpolar B. 12 and octanol are both polar C. 12 is attracted to octanol's OH group D. octanol and water do not mix 3._A student mixes two immiscible liquids in a test tube: water (d g/mL) and olive oil (density-0.80 g/mL). Which will be the bottom layer? A. Olive oil Waternossoe C. It is impossible to tell from the given data alone D. It depends which one was poured into the test tube first How does the aqueous solubility of benzoic acid compare 4. benzoate? но sodium benzoate benzoic acid A. Benzoic acid is less soluble B. Benzoic acid is more soluble C. The two are equally soluble in water D. It's impossible to predict

Answer 1

B - Heptanol Reason: water density is 0.999 g/cm^3 Heptanol density is 0.818 g/cm^3 rightarrow The least density only will be on the Top layer: (A) I_2 and octanol are both non polar Reason: - Non polar substances are likely to dissolve in non polar solvents: rightarrow I_2 is non-polar: covalent bonded compound. rightarrow octanol has many move non polar bonds than polar bonds. So overall the molecule considered non polar. \r\n (B) water: Reason: - More density compound will be Bottom layer: rightarrow Because water is polar and oil is non polar, their molecules are not attracted to each other, so there is no miscible to each other: (A) Benzoic acid is less soluble: Reason: - rightarrow sodium benzoane is soluble in water: because the ionic bond between the sodium and the benzoic acid breaks in water, leading to dissociation: rightarrow Benzoic acid is non-polar and water is polar: So Benzoic acid is insoluble in water;