9) Common common gardening soil? comon sn deniening oil ontains 50 ppm lead. How
ID: 556050 • Letter: 9
Question
9) Common common gardening soil? comon sn deniening oil ontains 50 ppm lead. How many grams of Iead are in a sample of 10) How many moles of bicarbonate, HCO,, are in 1.36 L of a 0.01 M bicarbonate solution? 11) An order to deliver 35 mg of morphine is prescribed to a patient. How many mL are required to deliver this in IV if the concentration of morphine in the solution is 125mg/3mL? 12) An order is given to administer 200. mg of Lipitor to a patient by IV over a 6 hour period. If 1.00 L bag contains 50 mg, how many bags must be delivered to the patient in the 6 hour period? 13) Which of the following statements regarding osmosis and diffusion are correct? a Solutes flow from high concentration to low concentration in osmosis. b. Solvent flows from low concentration of solute to high concentration of solute. Solutes flow from low concentration to high concentration in diffusion. Solutes flow from high concentration to low concentration in diffusion. Solvent moves from hypotonic solutions to hypertonic solutions in osmosis. d. 14) True or False: All bases will increase the concentration of hydroxide ions in solution. 15) Which of the following statements best describe what happens when a base reacts with water? a. Water donates a proton. b. Base accepts a proton. c. Hydronium ions are formed. d. Hydroxide ions are formed. 16) Write the complete reaction when pyruvic acid (CH COCOOH) reacts with bicarbonate (HCO3). Label the conjugate pairs.Explanation / Answer
Q9
ppm = mg of solute / kg of solution
then
50 mg of Lead per kg of soil sample
Q10
NaHCO3 --> Na+ + HCO3-
mol of NaHCO3 = M = 0.01*1.36 = 0.0136
mol o fHCO3- = mol of NaHCO3 = 0.0136 moles
Q11
C = 125 mg/3 mL = 41.667 mg/mL
V = 35/41.667 = 0.839 mL
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