A student weighs out 0.3333 g Na2CO3, dissolves it completely in 30 mL of deionized water, and titrates the resulting solution with 0.100 M HCl. Calculate the equivalence point volume expected for the complete titration of the Na2CO3. (Formula weights: Na2CO3 = 105.99 g/mole; HCl = 36.46 g/mole)   ​​A) 15.7 mL​​​ ​​B) 31.4 mL​​​ ​​C) 62.9 mL D) 114 mL E) 229 mL

Q: A multiple-tube fermentation test for coliform group of two water samples yielded the following…

A: Given data, 1 ml = 5 0.1 ml = 3 0.01 ml = 2 0.001 ml = 1 0.0001 ml = 0

Q: A 0.15 L sample of water has an initial dissolved oxygen level of 8.35 mg/L. After five days in…

A: BOD5=initial dissolved oxygen-final dissolved oxygen(sample volumesample bottle volume)

Q: 9. A core sample is saturated with Oil, Gas and Water , the initial weight of the saturated sample…

A: Given data - bulk volume of sample = 100 cc Initial weight of saturated sample is 220 gm Increased…

Q: For the particles in problem 3, determine the percent removal in a sedimentation basin with a depth…

A: Answer  We are given Before flocculation Average diameter = 20 μm  Specific gravity S = 2  After…

Q: A municipal wastewater sample is brought to the laboratory to determine the BOD5. The DO in the…

A:

Q: The results of a multiple-tube fermentation test of a water sample are shown to the right. What is…

A:

Q: Calculate the BOD, Initial Sample D.O. = 8.1 mg/L 5-Day Sample D.0. = 2.1 mg/L Vol. Of Sample in 300…

A: The given data is: Initial Sample D.O=8.1 mg/L 5-Day Sample D.O=2.1 mg/L Vol. Of Sample in 300 mL…

Q: (i) Calculate the Molarity, and mg/l as CACO3 for 200 mg/I H3PO4

A:

Q: You need to soften water at a 20 MGD potable water treatment facility using lime (Ca(OH)2) and soda…

A: Data Given:   Concentration Molecular Weight CO2 6 mg/L 44 g/mol Ca2+ 20…

Q: Available chlorine in bleaching powder solution is 0.5mg/ml. To obtain a chlorine dose of 0.1 mg/1…

A:

Q: The total hardness in raw water is 500 milligram per liter as CaCO3. The total hardness of this raw…

A: The total hardness in raw water with, Total hardness=500 mg/L as CaCO3Total hardness=?

Q: Calculate the pH of a solution that has a pOH of 8.70.

A: Introduction : The given question is related with environmental engineering . In this question we…

Q: Determine the density of Air at 84° F and 1 atm pressure. Assume laws of ideal gases holds.

A: Note : As per our guidelines for a multiple question only one question can be solved for other…

Q: 100-mL water sample is mixed with 200 mL of deionized water for BOD analysis. The DO of the mixture…

A:

Q: Solids analyses were conducted on a soybean processing wastewater. 50 ml of wastewater is used for…

A: Given, Volume of sample (V)=50 mL      for total solid analysis Volume of sample (V-)=100 mL   for…

Q: A Laboratory scale treatability study was done to determine kinetic constants with results shown in…

A: The maximum specific growth rate (µm) is a measure of the growth potential of microorganisms under…

Q: Determine the solution of the following DE

A: Given information in the question is ' D3+4D2+5Dy=0 we have to find out the differential equation of…

Q: The amount of chlorine residual remaining when gases start evolving during disinfection and when…

A: The amount of chlorine residual remaining when gases start evolving during disinfectionand when they…

Q: Drinking water quality problems: 1. An analysis of a sample of water with pH 7.5 has produced the…

A:

Q: If the BOD3 of a waste water sample is 75 mg/l and reaction rate constant k (base e) is 0.345 per…

A: BOD3 of a wastewater sample = 75 mg/L, Reaction rate constant K (base e) = 0.345/day, To Find- The…

Q: Ten pints of a 5% solution are diluted with 30 pints of diluent, what is the percentage strength of…

A:

Q: h=1.4, w =3,L= 4.7 alumium block  / brass block h=1.4, w =1.7l=2.4   densities  (p alumiun 2700kg/m3…

A:

Q: A container of water is being mixed to raise its dissolved oxygen concentration. The transfer…

A:

Q: sampie pr0a SIshipup a4 results Milligram per milli- Conceni lon equivalent for the ion (mg.

A: Name of the ion concentration of the ion. (Mg/l (E.W OF CaCo3) /E.W of Species. Hardness it…

Q: A water sample contains  40 mg/L of magnesium, 75 mg/L of calcium, and 10 mg/L of sodium. What is…

A:

Q: For the measurement of the BOD of a wastewater sample from textile industry, five different…

A: Given- Assume  K=-0.234day-1 t=5

Q: Calculate total hardness in ppm of a solution of both 55 mg/L Al2(SO4)3 and 45 mg/L Mg(NO3)2

A:

Q: If 19.3mL of the standardized Na2S2O3 solution was used in determining the DO, what is the DO…

A: 0.01 N Na2S2 O3 is used in titration to decolorized the blue solution and the volume of 0.01N Na2S2…

Q: (Al P,10%12)

A:

Q: If the BOD3 of a waste water sample is 75 mg/L and reaction rate constant K (base e) is 0.345/day,…

A:

Q: 3.2 If an ion exchange water softener has 0.2 m' of ion-exchange resin with an exchange capacity of…

A: 3.2)

Q: Families in a community in a developing country use large, 200.0 L drums to un-treated surface…

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…

Q: The coliform organisms in a water sample (in mL) are tested using the multiple-tube fermentation…

A:

Q: In standardization, 10.00 mL of Naz C2 04 solution required 39.17 mL of KMN04. Find the molarity of…

A: Standardization Process: Assuming that 0.3562 g of Na2C2O4 is dissolved in 250 mL of water to make a…

Q: Water quality indicates that the water contains Na* at 50 mg/L, K* at 30 mg/L, Ca2+ at 80 mg/L, and…

A:

Q: FORMULA: The formula for calculating the water content for Plastic limits is as follows: W1 – W2…

A:

Q: a) Write down the chemical equations for the reactions that take place in the DO test. b) Discuss…

A: Find:The chemical equations for the reactions that take place in the DO test. The environmental…

Storm Sewers and Detention

The storm drains system transports rainwater or stormwater and other runoff from roads, parking lots, and roof downpipes directly to nearby creeks, rivers, or the sea without any treatment.