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What / Know Pre-Assessment Directions:
Read the questions carefully. Write the letter of your answers on a separate sheet of paper.
1. What is a solution? It is a mixture of substances with A. two phases C. one phase only B. sticky texture D. inseparable components 2. Among these substances, which is NOT a solution? A. Alloy B. Salad C. Smoke D. Vinegar 3. How do you describe a solute? It is a substance which in amount in the solution. A equal B. less C. high D. more 4. Which statement describes a solvent? It is a substance in_amount in the solution. A. equal B. less C. high D. varied 5. Which of these substances is NOT a solvent? A. Mud B. Soy sauce C. Vinegar D. Water 6. What is meant by concentration of solution? It describes the amount of present in the solution. A. solute B. solvent C. either D. neither 7. Which of the following concentrations of muriatic aqueous solutions has the highest amount of solute present? A. 15% B. 25 % C. 35% D. 45% 8. What would be the amount of carbon in every 100 grams of 40% steel? A 10 grams B. 20 grams C. 30 grams D. 40 grams 9. Which of the following expressions is a percentage concentration of solution? A. proof C. mol/kilogram B. mol/liter D. (mass/mass) X 100 10. What is the percentage concentration of solution if 2 mL sulfuric acid (H2SO4) is added to 8 ml of water in the beaker? A 15% B. 25% C. 35% D. 45% 11. What will happen to the concentration of the solution when more solvent is added to it? The concentration of the solution will A. decrease B. fluctuate C.increase D. remain the same 12. What must be done to increase the concentration of a solution? To increase the concentration of a solution, you must add A. solute C. both solute and solvent B. solvent D. neither solute nor solvent 13. How much water is needed to prepare a 5% of 100 mL muriatic acid aqueous solution? A. 65 mL B. 75 ml C. 85 mL D. 95 ml
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