A 1435 mL sample of drinking water was found to contain 67.0 mg of lead. Calculate...
A 1025 mL1025 mL sample of drinking water was found to contain 33.0 mg33.0 mg of lead. Calculate the concentration of lead in milligrams per liter.
a. Calculate the number of moles of solute in 58.19 mL58.19 mL of 0.1285 M K2Cr2O7(aq). b. An aqueous potassium carbonate solution is made by dissolving 6.506.50 moles of K2CO3K2CO3 in sufficient water so that the final volume of the solution is 2.90 L2.90 L. Calculate the molarity of the K2CO3K2CO3 solution. c. A patient's blood test shows that her hemoglobin concentration is 17.017.0 g/dL. How many milligrams of hemoglobin are in every 4.504.50 mL of the patient's blood? d.How...
Isopropyl alcohol is mixed with water to produce a 38.0% (v/v) alcohol solution. How many milliliters of each component are present in 875 mL of this solution? Assume that volumes are additive. alcohol: mL water: ml The mass of solute per 100 mL of solution is abbreviated as (m/v). Mass is not technically the same thing as weight, but the abbreviation (w/v) is also common. How many grams of sucrose are needed to make 695 mL of a 38.0% (w/v)...
A water supply was known to contain lead (II) ions. A 100.0 mL aliquot of the solution was pipetted, and its mass determined to be 100.53 g. The 100.0 mL aliquot was acidified, and 21.25 mL of a 0.01235 M potassium dichromate solution were required to oxidize all of the lead (II) ions. Calculate (1) the molarity of the lead (II) ions in the solution, and (2) the mass percent of the lead (II) ions in the solution. 3. A...
How many milliliters of a 0.900% (m/v) normal saline solution can be prepared from 2.00 g of sodium chloride, NaCl ? Note that mass is not technically the same as weight, but the abbreviation % (w/v) is often used interchangeably with % (m/v).
Q5) A 63.5 g sample of ground water is found to have a lead concentration of 19.85 ppm. Calculate the mass of lead in the sample in milligrams. Q4) A 2105 g sample of ground water is found to contain 0.0500 g of arsenic. Calculate the concentration of arsenic in parts per million, ppm.\
The drinking water in Saplingville was found to contain 12 ppb (parts per billion) of lead. What is the concentration of lead in molarity?
3. A water supply was known to contain lead (II) ions. A 100.0 mL aliquot of the solution was pipetted. and its mass determined to be 100.53 g. The 100.0 mL aliquot was acidified, and 21.25 mL of a 0.01235 M potassium dichromate solution were required to oxidize all of the lead (I) ions, Calculate (1) the molarity of the lead (II) ions in the solution, and (2) the mass percent of the lead (II) ions in the solution.
erksheet 7-Rey 10 A 10.0 mL sample of sodium chioride solution that has a mass of 16.78 g is placed in an Solutions evaporating dish and evaporated to dryness. The residue has a mass of 6.55 g. Calculate the following concentrations for the NaCl solution mass/mass (m/m) percent mass/volume (m/v) percent malarity A 4.00 % (g/mL) KI solution has a volume of 65.0 mL. How many grams of KI are in the sample? How many grams of a 35% (...
A 56.2 g sample of ground water is found to have a lead concentration of 17.39 ppm. Calculate the mass of lead in the sample in milligrams.