Give handwritten answer- Essential to public health is potable water. Calculate the amount of chlorine needed to disinfect 50 ML water to a residual dose of 0.3 mg/L. You need to add an additional 0.4 mg/L to the water in order to reach the breakpoint for chlorine addition based upon jar tests for this particular drinking water. Explain what the breakpoint is and why you would want a residual 0.3 mg/L of chlorine in your water.

Give handwritten answer- Essential to public health is potable water. Calculate the amount of chlorine needed to disinfect 50 ML water to a residual dose of 0.3 mg/L. You need to add an additional 0.4 mg/L to the water in order to reach the breakpoint for chlorine addition based upon jar tests for this particular drinking water. Explain what the breakpoint is and why you would want a residual 0.3 mg/L of chlorine in your water.

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter13: The Chemistry Of Solutes And Solutions

Section: Chapter Questions

Problem 94QRT

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Give handwritten answer- Calculate the amount of chlorine needed to disinfect 50 ML water to a residual dose of 0.3 mg/L. You need to add an additional 0.4 mg/L to the water in order to reach the breakpoint for chlorine addition based upon jar tests for this particular drinking water.
Too much manganese in drinking water can cause the following undesirable effects: black to brown color; black staining; bitter metallic taste . The EPA's Secondary Maximum Contaminant Level for manganese in drinking water is5.00×10-2 mg/L.(1) If 4.45×104 liters of water in a storage tank contains 10.0 grams of Mn , what is the contaminant level in ppm? ppm Assume that the density of the impure water is 1.00 g/mL.(2) Is this level acceptable based on EPA guidelines?
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A sample (50 mL) of a bottled water was added to a 100 mL volumetric flask and then diluted to the mark. From this stock solution, 50 mL was taken, added to a 100 mL volumetric flask and diluted to the mark. Final concentration of the serial dilution: 587.7161ppm. 1. what is the concentration in the original bottle (ppm)
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Draw a schematic diagram using this information. Preparation of the solution Take about 25-30 ml of distilled water in a beaker and add powdered crude copper sulphate while stirring the solution so that the powder dissolves. Keep adding the powdered sample till a little of it remains undissolved, even if it is stirred thoroughly. Now add 2-3 ml of dil. H2SO4 to make the solution clear. This prevents the hydrolysis of copper sulphate. Filtration of the solution Take a funnel and fix a filter paper in it and clamp it to a stand. Place a china dish under the funnel. The stem of the funnel should touch the wall of the china dish to avoid the solution splashing out. Pour the solution into the funnel over a glass rod and collect the filtrate in a china dish. The insoluble impurities are left in the filter paper as residue. Concentration of the filtrate to crystallisation point Heat the china dish on a sand bath till the solution is reduced to about one-third of its original volume. To…
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