1. Unit 4 Test Review topics! Mark + or – in the categories that you get correct. This will mark your understanding before the test

2. 1. Vocabulary: Solutions What is a solute and solvent?

3. Answer Solute - is what is being dissolved or diluted. Solvent - is what is doing the dissolving or diluting

4. 2. Vocabulary: Solutions If you have dissolved as much Kool- Aid as possible in water is there any possible way to make more dissolve in it?

5. Answer Heat the solution. This will increase the concentration!

6. 3. Vocabulary: Conductivity Draw a complete circuit with a light bulb, wire, and battery. Remember there are 2 contact points on a light bulb. The bottom and the side!

7. Answer

8. 4. Vocabulary: Draw 2 beakers. One with ions and one without

9. Answer

10. 5. Vocabulary: What 2 ways can you make this more conductive?

11. Answer Adding more ions by increasing concentration or by adding a chemical with a bigger charge!

12. Basic % Composition If you have 35g of sugar in 100g of water what is the % composition of sugar in the solution?

13. Answer 25.93%

14. 1. Basic % Composition If you have 25mL diluted in 1000mL of water what is the % composition of HCl in the solution?

15. Answer 2.44%

16. 2. Basic % Composition If you have 231.2g of NaCl in 1256.3g of HCl what is the % composition of salt in the solution?

17. Answer 15.54%

18. 1. Advanced % Composition If you have 200g of NaCl in 200ml of water what is the % composition by mass of salt in the solution? The density of water is 1g/ml.

19. Answer 50%

20. 2. Advanced % Composition If you have 200g of NaCl in 200ml of HCl what is the % composition by mass of salt in the solution? The density of water is 1.26g/ml.

21. Answer 44.25%

22. 3. Advanced % Composition If you have 55ml of NaOH in 150g of HCl what is the % composition by mass of NaOH in the solution? The density of NaOH is 0.54g/ml.

23. Answer 16.53%

24. 1. Basic Molarity If you have 4moles of a solute dissolved in 2L of solvent what is the molarity?

25. Answer 2M

26. 2. Basic Molarity If you have 3.56moles of a solute dissolved in 1.23L of solvent what is the molarity?

27. Answer 2.89M

28. 3. Basic Molarity If you have 3.4L of a 0.4M solution how many moles are dissolved in solution?

29. Answer 1.36 moles

30. 1. Moles If you have 34g of NaCl how many moles do you have?

31. Answer 0.58 moles

32. 2. Moles If you have 4.12 moles of NaCl how many g do you have?

33. Answer 241.02g

34. 1. Conversion If you have 1000ml how many L do you have?

35. Answer 1L

36. 2. Conversion If you have 1345ml how many L do you have?

37. Answer 1.345L

38. 3. Conversion If you have 0.5L how many mL do you have?

39. Answer 500mL

40. 1. Advanced Molarity If you have 46g of NaCl dissolved in 430mL of HCl what is the molarity?

41. Answer 1.83M

42. 2. Advanced Molarity If you have 32.4g of CO 2 dissolved in 687.1mL of water what is the molarity?

43. Answer 1.06M

44. 1. Basic M 1 V 1 =M 2 V 2 You want to create 200ml of a 2M solution. To do this you use a 4M stock solution. How much of the stock solution do you need?

45. Answer 100mL

46. 2. Basic M 1 V 1 =M 2 V 2 You want to create 150ml of a 3M solution. To do this you use a 4M stock solution. How much of the stock solution do you need?

47. Answer 112.5mL

48. 1. Advanced M 1 V 1 =M 2 V 2 You start with 345.2ml of an unknown molarity solution. From this you create 754ml of a 2.34M solution. What is the molarity of your stock solution?

49. Answer 5.11M

50. Extra Credit (but this will still be on your test) You create a stock solution using 13.4g of NaCl and 431ml of water. From this stock solution you create 600ml of a 0.4M solution. How much of the stock solution did you use?