Question

list two examples of aqueous solutions.
check all that apply
h₂o(l)
co(no₃)₂(aq)
nabr(aq)
agcl(s)
c₂h₆o(l)
srco₃(s)
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Explanation:

Step1: Define Aqueous Solution

An aqueous solution is a solution where water is the solvent. The state symbol \((aq)\) indicates an aqueous solution.

Step2: Analyze Each Option

• \( \ce{H2O(l)} \): This is liquid water, not a solution (no solute dissolved in it).
• \( \ce{Co(NO3)2(aq)} \): The \((aq)\) state symbol shows cobalt(II) nitrate is dissolved in water, so this is an aqueous solution.
• \( \ce{NaBr(aq)} \): The \((aq)\) state symbol shows sodium bromide is dissolved in water, so this is an aqueous solution.
• \( \ce{AgCl(s)} \): This is a solid (silver chloride), not an aqueous solution.
• \( \ce{C2H6O(l)} \): This is liquid ethanol, not an aqueous solution (it's a pure liquid, not a solution with water as solvent in the context of being a solute - though ethanol can be a solute, here it's in liquid state).
• \( \ce{SrCO3(s)} \): This is a solid (strontium carbonate), not an aqueous solution.

Answer:

B. \( \ce{Co(NO3)2(aq)} \), C. \( \ce{NaBr(aq)} \)