Question

question 1
which compounds would get a phase label of (aq)?
□ zns
□ pbcl₂
□ nacl
□ fe(no₃)₃

Explanation:

Step1: Recall solubility rules

Salts of Group 1 metals (like Na⁺) and nitrates (NO₃⁻) are generally soluble. Chlorides: most are soluble, except for Ag⁺, Pb²⁺, Hg₂²⁺. Sulfides: most are insoluble, except for Group 1, 2, and ammonium.

Step2: Analyze each compound

• ZnS: Sulfide, insoluble (not aq).
• PbCl₂: Chloride of Pb²⁺, insoluble (not aq).
• NaCl: Group 1 metal salt, soluble (aq).
• Fe(NO₃)₃: Nitrate salt, soluble (aq).

Answer:

NaCl, Fe(NO₃)₃ (the checkboxes for NaCl and Fe(NO₃)₃ should be selected)