Question

the diagram below is a model of two solutions. each ball represents one particle of solute.
solvent volume: 50 ml
solution a
solvent volume: 40 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 pink particles in Solution A

Concentration formula: \(C=\frac{n}{V}\) (where \(n\) is the number of solute particles, \(V\) is the volume of solvent). For Solution A, \(n = 9\) (number of pink particles), \(V=50\space mL\). So \(C_A=\frac{9}{50}= 0.18\space particles/mL\)

Step2: Calculate concentration of pink particles in Solution B

For Solution B, \(n = 3\) (number of pink particles), \(V = 40\space mL\). So \(C_B=\frac{3}{40}=0.075\space particles/mL\)

Answer:

Solution A