What is the concentration (% w/v) of 5g of NaCl dissolved in 100mL of solution? A 0.5% B 5% C 50% D 0.05% ✓ Correct Answer: Option B % w/v = (grams of solute / mL of solution) × 100 = (5/100) × 100 = 5%. Practice PCAT Exam Prep Quizzes → Browse All Questions Study Flashcards