A buffer solution that is 0.403 M in HF and 0.403 M in NaF has a pH of 3.14.

(1) The addition of 0.01 mol of H3O+ to 1.0 L of this buffer would cause the pH to increase slightly increase by 2 units decrease slightly decrease by 2 units not change.

(2) The capacity of this buffer for added H3O+could be increased by the addition of 0.148 molof the weak acid of the salt.

Consider these compounds:

A. CaCrO4
B. Fe2S3
C. CaCO3
D. Ca3(PO4)2
Complete the following statements by entering the letter corresponding to the correct compound.

Without doing any calculations it is possible to determine that zinc phosphate is more soluble than , and zinc phosphate is less soluble than .

It is not possible to determine whether zinc phosphate is more or less soluble than by simply comparing Ksp values.