Characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices. (1) A colloidal dispersion is a homogeneous mixture and a suspension is a heterogeneous mixture.
(2) The selectivity of a semipermeable membrane is based on polarity differences among molecules.
(3) For dilute aqueous solutions, %(m/m) and %(m/v) concentration units have almost the same magnitude because the density of water is 1.00 g/mL and the solution is almost entirely water.
A) All three statements are true.
B) Two of the three statements are true.
C) Only one of the statements is true.
D) None of the statements is true.

Question

Quizplus · Accepted Answer

(1) False - A colloidal dispersion is a heterogeneous mixture and a suspension is also a heterogeneous mixture.
(2) True - The selectivity of a semipermeable membrane is based on polarity differences among molecules.
(3) True - For dilute aqueous solutions, %(m/m) and %(m/v) concentration units have almost the same magnitude because the density of water is 1.00 g/mL and the solution is almost entirely water. Therefore, both are true statements. Therefore, the collective true-false status of the statements is “two of the three statements are true”. Therefore, the best choice is B.

Characterize EACH of the Three Given Statements as Being TRUE