Question

the diagram below is a model of two solutions. each ball represents one particle of solute.
solvent volume: 40 ml
solvent volume: 20 ml
solution a
solution b
which solution has a higher concentration of purple particles?
solution a
solution b
neither; their concentrations are the same

Explanation:

Step1: Calculate concentration of purple 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, \(n = 3\), \(V=40\space mL\). So \(C_A=\frac{3}{40}= 0.075\space particles/mL\).

Step2: Calculate concentration of purple particles in Solution B

For Solution B, \(n = 4\), \(V = 20\space mL\). So \(C_B=\frac{4}{20}=0.2\space particles/mL\).

Answer:

Solution B