We’re being asked to determine the solution that will have a pH less than 7.0.
Ionic salts are made up of positively charged ion (cation) and a negatively charged ion (anion). To determine if the ionic salt would be acidic, basic, or neutral, we need to identify the acidity or basicity of the cation and anion.
• transition metal
▪ charge of +2 or higher → acidic
▪ less than +2 → neutral solution
• main group metal
Which of the following 0.10 M solutions will have a pH less than 7.0?
A. X and Z only
B. X and Y only
C. Y and Z only
D. W and Y only
E. W and X only
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