Worksheet # 4 (review)
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Worksheet # 4 (review)

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Worksheet # 4 (review) Worksheet # 4 (review) Document Transcript

  • Name ________________________________________________________ Group ___________Date __________________________________________________________ List # _____________ Worksheet # 4Solutions and Solubility practice1.- What is the x axis for a solubility curve?a) Grams of solvent per 100 grams of waterb) Grams of solute per 100 grams of waterc) Temperature of the soluted) Temperature of the solvent2.- What is the y axis for a solubility chart?a) Grams of solvent per 100 grams of waterb) Grams of solute per 100 grams of waterc) Temperature of the soluted) Temperature of the solvent3.- What are the common units used to express solubility?a) g solute/g solvent b)g solute/ 100 g water c)Molarity d)% by mass4.- Use the solubility curve to answer the following questions: What is the solubility of KNO3 at 40 C? _________________________________________ Which of the following are saturated solutions? a)50 g CaCl2 in 100 g water at 10 C_________ b)10 g KClO3 in 50 g water at 50 C __________ c) 70 g of K2Cr2O7 in 100 g water at 90 C _______________5.- In a mixture of 50 mL of benzene(nonpolar) and 48 mL of octane(nonpolar),a) which substance is the solute?___________b)which substance is the solvent?___________c)Using the concept of “like dissolves like” would these two substances form a solution?(yes/no) ______________ Explain________________________________________________6.- Compare three bottles of soda. Bottle A was stored at room temperature (25°C),bottle B was stored at 10°C, and bottle C was stored at 30°C.a) If you wanted a fizzy drink, which bottle would you choose? _____________ why?_______________________________________________________________________________7.- Classify the following as soluble or insolublea)PbBr2 b)KCl c)AgI d)Na2SO4 e)NaNO38.- Describe the properties of a true solution. (5)
  • 9.- Define the following terms:a)solubleb)insolublec)miscibled)immiscible10.- Describe 3 ways in which you can increase the speed at which a solid dissolves.Molarity practice1.- Find the molarity of the following solutions:a)0.5 moles of sodium chloride is dissolved to make 0.05 liters of solution.b) 0.5 grams of sodium chloride is dissolved to make 0.05 liters of solution.c) 0.5 grams of sodium chloride is dissolved to make 0.05 mL of solution.2.- Find the amount of grams of solute needed to prepare the following solutions: a) 200 ml of a 2.5 M CaCO3 solution b) 2L of a 2.5 M MgCO3 solution3.- How would you prepare (solute and solvent needed) the following solutions:a)1500 ml of a 3M HCl solution
  • Percent concentration1.- What amount of sugar and water are needed to prepare 700 ml of a 15% solution?2.- Calculate the % by mass of a solution containing 35 g HCl in 1200 ml solution.3.- What volume of methanol is in a 400 ml bottle containing a 45% methanol solution?Water1.- Sketch a flow chart showing the steps used to purify water in a purification plant.2.- Describe what happens at each stage of the purification process.