SAT Subject Test Chemistry,10 edition

Questions   58–59   refer   to  the following   equation:

Addition    of  a   nonvolatile solute  raises  the vapor   pressure    of  a   solution.   Therefore,  a

higher  temperature will    be  needed  to  produce boiling.

I.

The molal   concentration   of  solute  particles   dissolved   in  the solvent is  an  important

factor  in  determining the molal   boiling-point   elevation   constant.

II.

The identity    of  solute  particles   dissolved   in  the solvent is  an  important   factor  in

determining the molar   boiling-point   elevation   constant.

III.

(A) I   only

(B) II  only

(C) I   and III only

(D) II  and III only

(E) I,  II, and III

57 . What is the sum of the coefficients of the products for the following reaction, after
balancing?

...K 2 Cr 2 O 7     +   ...HCl  →   ...KCl  +   ...CrCl 3   +   ...H 2 O    +   ...Cl 2

(A) 10

(B) 12

(C) 13

(D) 14

(E) 15

58 . What is X?