Question

the diagram below is a model of two solutions. each pink ball represents one particle of solute. solvent volume: 25 ml solution a solvent volume: 20 ml solution b which solution has a higher concentration of pink particles? solution a solution b neither; their concentrations are the same

Explanation:

Step1: Calculate concentration of Solution A

Concentration formula: \(C=\frac{n}{V}\) (where \(n\) is amount of solute, \(V\) is volume of solvent). For Solution A, \(n = 5\), \(V=25\space mL\). So \(C_A=\frac{5}{25}=\frac{1}{5}= 0.2\) (particles per mL).

Step2: Calculate concentration of Solution B

For Solution B, \(n = 5\), \(V = 20\space mL\). So \(C_B=\frac{5}{20}=\frac{1}{4}=0.25\) (particles per mL).

Step3: Compare concentrations

Since \(0.25>0.2\) (\(C_B > C_A\)).

Answer:

Solution B