You add 50 ml of water to 150 ml of a 6 solution. What is the new concentration?

(Answer to Q. 1)  ANS: B
If 50 ml of water is added to 150 ml of a 6 (0.03) solution, the new concentration is calculated by rearranging the dilution equation to find C2.

(Answer to Q. 2)  ANS: C
In nonpolar covalent solutions, molecules of solute remain intact and do not carry electrical charges; these solutions are referred to as nonelectrolytes.

(Answer to Q. 3)  ANS: D
For example, to convert a serum Na+ value of 322 mg/dl to mEq/L

(Answer to Q. 4)  ANS: A
The gram equivalent weight of an acid may be calculated by dividing its gram formula weight by the number of hydrogen atoms in its formula, as shown in the following reaction:
The single H+ of hydrochloric acid (HCl) is replaced by Na+. One mole of HCl has 1 mol of re-placeable hydrogen. By definition, the gEq of HCl must be the same as its gram formula weight, or 36.5 g.

(Answer to Q. 5)  ANS: A
Gram equivalent weight values. A gEq of a substance is calculated as its gram atomic (formula) weight divided by its valence. The valence signs (+ or ) are disregarded.

(Answer to Q. 6)  ANS: B
If an electrode is placed in such a solution, positive ions migrate to the negative pole of the elec-trode. These ions are called cations.

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