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Lakeland Solutions Review

Lakeland Solutions Review. Click on a question to begin. Question 1. Try Again. Be sure to convert the 40 g to moles before plugging into the molarity equation. Try Again. Correct!. 40 grams of NaOH is equal to 1 mole. 1 mole divided by 0.5 L is equal to 2.0 M. Next Question.

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Lakeland Solutions Review

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  1. Lakeland Solutions Review

  2. Click on a question to begin

  3. Question 1

  4. Try Again • Be sure to convert the 40 g to moles before plugging into the molarity equation. Try Again

  5. Correct! • 40 grams of NaOH is equal to 1 mole. 1 mole divided by 0.5 L is equal to 2.0 M. Next Question

  6. Question 2

  7. Try Again • Be sure to convert the grams to moles and the milliliters to liters. Try Again

  8. Correct! • 180 g of C6H12O6 is equal to 1 mole. 1 mole divided by 0.5 L (500 mL) is equal to 2.0 M. Next Question

  9. Question 3

  10. Try Again • Molarity is moles of solute per liter of solution Try Again

  11. Correct! • There are 4 moles of solute in 2 liters of solution. Molarity is moles divided by liters so 4/2 = 2 M Next Question

  12. Question 4

  13. Try Again • Review your solutions vocabulary Try Again

  14. Correct! • An electrolyte is a solution that can conduct electricity Next Question

  15. Question 5

  16. Try Again • The addition of a solute changes the vapor pressure of a solution. The more solute dissolved, the greater the change in colligative properties. Try Again

  17. Correct! • The 3.0 M solution has more solute dissolved than the 2.0 M solution. This means that there will be a greater boiling point elevation and freezing point depression Next Question

  18. Question 6

  19. Try Again • Review the definition of molarity Try Again

  20. Correct! • 3.0 M means that there are 3.0 moles per liter of solution Next Question

  21. Question 7

  22. Try Again • Use the molarity equation to solve for number of moles and then convert to grams Try Again

  23. Correct! • Molarity = moles/liters so 1.00 M = x/0.50 L. X = 0.500 mol. Convert 0.500 mol to grams of HI (mass = 128 g) to get 64 grams. Next Question

  24. Question 8

  25. Try Again • The lowest freezing point will have the lowest vapor pressure. The more ions present, the lower the vapor pressure. Try Again

  26. Correct! • The beaker contains the most ions which will reduce vapor pressure the most. Next Question

  27. Question 9

  28. Try Again • Remember that Molarity is moles per liter Try Again

  29. Correct! • 0.50 mol/0.50 liters is 1.00 M Next Question

  30. Question 10

  31. Try Again • Molarity equals moles of solute divided by liters of solution. Try Again

  32. Correct! • 3.0 M = x/2.0 L so x = (3.0)(2.0) = 6.0 mole Next Question

  33. Question 11

  34. Try Again • The exponents in the expression tell you how many of each ion are present in the compound Try Again

  35. Correct! • The exponents in the expression mean that there are 2 A and 3 B in the solid. Next Question

  36. Question 12

  37. Try Again • Think about what is the best way to keep carbonation in pop. Try Again

  38. Correct! • Increasing pressure increases the solubility of a gas in a liquid Next Question

  39. Question 13

  40. Try Again • Convert the grams of sugar to moles and divide by the liters in order to determine molarity Try Again

  41. Correct! • 180 grams of C6H12O6 is equal to 1 mole. 1 mole divided by 0.5 L (500 mL) is 2.0 M. Next Question

  42. Question 14

  43. Try Again • The addition of a solute causes a change in vapor pressure resulting in boiling point elevation and freezing point depression Try Again

  44. Correct! • The addition of a solute causes the boiling point to go up and the freezing point to go down. Next Question

  45. Question 15

  46. Try Again • %v/v = volume of solute x 100 volume of solution Try Again

  47. Correct! • 70 = x x 100 x = 413.7 mL 591 Next Question

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