0.5 mL of 1% (w/v) coagulant is added into 250 ml of raw water. 0.1 mL...
5. What is the % w/v of a solution that has 250 mg of penicillin V dissolved in a total volume of 100 ml of distilled water ? 6. Using the formula CV=C1V1 given a total volume of 300ml of a 10% w/v of a bleach solution how many ml of this stock solution is need to make a 1.0% solution ? 7. A total of 125 ml of a 10% solution is diluted to...
QUESTION1 A 15-mL sample is added to à 300-ml 8OD bottle. Dilution water is added to the sample bottle and the initial dissoved axygen concentration is measured as 8.5 mg/L. After the sample is sealed, the laboratory incorrectly takes a measurement of dissolved oxygen reading on day 6 of 3 mg/L. If the BOD reaction rate coefticient for the sample is 0.30/day, estimate what the 5-day BOD should have been QUESTION 2 A 15-mL sample is added to a 300-mL...
Calculate % v/v when 35 mL ethanol is added to enough water to make 250 mL solution.
How much distilled water must be added to 0.5 mL of 0.1 M FeCl3 to make it 0.001 M FeCl3?
You are assigned to operate a drinking water treatment plant which has a capacity of 280 ML per day. The source water is from a river that contains a high concentration of dissolved organic carbon (DOC), (13 mg L-1) and has a high colour (60 HU) but where the alkalinity changes seasonally. In summer to winter the alkalinity is high (> 100 mg L-1 as CaCO3) and in spring after snow has melted in the mountains and the water flows...
Question 17 0.5 pts 0.25 mol of solid glucose (C6H120) is dissolved in 100. mL of water, what is the (w/w%)-(3 SF) Question 18 0.5 pts What is the w/w% if 293.7 g is dissolved in 1.00 L of water to give a density 1.18 g/mL D Question 19 0.5 pts What is the concentration in V/V% for 250 mL of solution contains 13.1 mL of acetone. (3 SF)
3. 0.5 mL of diluent is added to 0.5 mL of a 100 mg/dL glucose solution. What is the dilution? What is the final concentration?
If a solution of 10 mg/ml methyl orange is diluted 100 times, 1 ml added to 99 ml of water for example, what is the final concentration? A. 1 mg/ml B. 0.1 mg/ml C. 0.001 mg/ml
A 1435 mL sample of drinking water was found to contain 67.0 mg of lead. Calculate the concentration of lead in milligrams per liter. lead concentration: m g/L Calculate the percent mass per volume, % (m/v), of a dextrose solution containing 8.00 g of dextrose in 2.00 x 10 mL of solution. Note that mass is not technically the same as weight, but the abbreviation % (w/v) is often used interchangeably with % (m/v). percent mass per volume concentration: %...
Your contract with NYC requires you to advise the plant technicians on coagulant dosage control which processes 0.200 m^3/s of raw water. The ferric chloride used in the process is purchased in 55 gallon drums, and you call the ferric chloride "Iron Solution." Calculate the daily requirements for Iron Solution (in drums/d) that must be added to the raw water the achieve a dose of 90.0 mg Fe3+ per L of raw water. Assume that the Iron Solution contains 6.00%...