Problem 4 – A laboratory report for a sample of water collected from a natural reservoir showed the following results: Concentration (mg/L) Component CO2 12.0 Ca2+ Mg2+ 30.0 70.0 Na+ 12.0 SO42- 240.0 Alkalinity pH 180 as CaCO3 7.1 a) Calculate total hardness, carbonate hardness, and noncarbonate hardness. b) Draw a bar chart that clearly depicts the total hardness, carbonate hardness, and noncarbonate hardness. c) Calculate the calcium carbonate hardness, the calcium non-carbonate hardness, the magnesium carbonate hardness, and the magnesium non-carbonate hardness. d) Based only on that water sample, would you use the water directly from the reservoir for domestic use? Why? If not, would you make a recommendation for the water to be treated before consumption? Given: Equivalent Weight (mg/meg) Component Ca2+ 20.0 Mg2+ 12.2 Na+ 23.0 so,2- 48.0 Alkalinity 50.0

Problem 4 – A laboratory report for a sample of water collected from a natural reservoir showed the following results: Concentration (mg/L) Component CO2 12.0 Ca2+ Mg2+ 30.0 70.0 Na+ 12.0 SO42- 240.0 Alkalinity pH 180 as CaCO3 7.1 a) Calculate total hardness, carbonate hardness, and noncarbonate hardness. b) Draw a bar chart that clearly depicts the total hardness, carbonate hardness, and noncarbonate hardness. c) Calculate the calcium carbonate hardness, the calcium non-carbonate hardness, the magnesium carbonate hardness, and the magnesium non-carbonate hardness. d) Based only on that water sample, would you use the water directly from the reservoir for domestic use? Why? If not, would you make a recommendation for the water to be treated before consumption? Given: Equivalent Weight (mg/meg) Component Ca2+ 20.0 Mg2+ 12.2 Na+ 23.0 so,2- 48.0 Alkalinity 50.0

Appl Of Ms Excel In Analytical Chemistry

2nd Edition

ISBN:9781285686691

Author:Crouch

Publisher:Crouch

Chapter3: Statistical Tests With Excel

Section: Chapter Questions

Problem 6P

See similar textbooks

Similar questions

A solution is made from CaCl2 and MgCl2 so that [Ca*2] = 0.00050 M, [Mg*2] = 0.00050 M. A 0.05M solution of Na,Cr207 is added. Answer the following questions. Note: Ksp(CaCr207) = 4.8*10-7 Ksp(MgCr207) = 7.6*10-8 Which salt will be the first to precipitate? Na2Cr207 CaCr207 CaCl2 MgCr207 OM9CI2 What is the maximum [Cr2072] concentration that can be made to precipitate only one salt? The initial CaCl, and MgCl, solution has a volume of 100cc. How many mL of the Na,Cr207 solution should be added to only precipitate one salt? Answer in mL.
If a student used the molar mass of magnesium to calculate the concentration in parts per million (ppm) of a manganese stock standard solution, would the reported weight percent of manganese in a subsequent unknown, that was compared colorimetrically, be higher, lower, or not change?
A water has the following analysis: Cation Nat K* Ca²+ Mg2+ ST²+ mg/L 20 30 5 10 2 Anion C1- HCO CO3²- SO4- NO, 3 What is the total alkalinity and total hardness in mg/L as CaCO;? mg/L 40 67 0 5 10
Which of the following is least soluble? Group of answer choices PtS (Ksp = 8 x10-73) NiS (Ksp = 3 x10-21) FeS (Ksp = 3 x10-19) CuS (Ksp = 3 x10-37) MnS (Ksp = 7 x10-16)
SAMPLE: CANE VINEGAR % acidity in label: 4.5% %purity of KHP: 99.80% FORMULA WEIGHT of KHP: 204.22 g/mol STANDARDIZATION OF NAOH SOLUTION TRIAL 1 TRIAL 2 TRIAL 3 Weight of KHP, g Initial volume of NaOH, mL Final volume of NaOH, mL 0.1012 0.1004 0.09987 5.00 10.01 4.95 9.99 14.93 Molarity of NaOH Average Molarity of NaOH ANALYSIS OF ACETIC ACID IN A VINEGAR SAMPLE TRIAL 1 TRIAL 2 TRIAL 3 Volume of vinegar, mL 1.00 1.00 1.00 Initial volume of NaOH, mL 14.98 22.90 30.87 Final volume of NaOH, mL 22.84 30.77 38.75 Molarity of acetic acid Average molarity of acetic acid ANALYSIS OF CARBONIC ACID IN A SODA SAMPLE TRIAL 1 TRIAL 2 TRIAL 3 Volume of soda, mL 20.0 20.0 20.0 Initial volume of NaOH, mL 20.20 22.05 23.93 Final volume of NaOH, mL 22.03 23.89 25.8 Molarity of carbonic acid Average molarity of carbonic acid
Part Il: Determination of Standard Solutions mL of 0.200 mL H20 added M Cuso, diluted Tube # M Cuso4-5 H20 added Absorbance about 3 0.200 1.346 3. 4.00 1.00 0.945 4 3.00 2.00 0.715 2.00 3.00 0.469 6. 1.00 4.00 0.281 show calculation for Tube #3 diluted concentration:
TITRIMETRIC DATA SAMPLE: CANE VINEGAR % acidity in label: 4.5% %purity of KHP: 99.80% FORMULA WEIGHT of KHP: 204.22 g/mol STANDARDIZATION OF NaOH SOLUTION TRIAL 1 TRIAL 2 TRIAL 3 Weight of KHP, g 0.1012 0.1004 0.09987 Initial volume of NaOH, mL 5.00 10.01 Final volume of NaOH, mL 4.95 9.99 14.93 Molarity of NaOH Average Molarity of NaOH ANALYSIS OF ACETIC ACID IN A VINEGAR SAMPLE TRIAL 1 TRIAL 2 TRIAL 3 Volume of vinegar, mL Initial volume of NaOH, mL 1.00 1.00 1.00 14.98 22.90 30.87 Final volume of NaOH, mL 22.84 30.77 38.75 Molarity of acetic acid Average molarity of acetic acid ANALYSIS OF CARBONIC ACID IN A SODA SAMPLE TRIAL 1 TRIAL 2 TRIAL 3 Volume of soda, mL 20.0 20.0 20.0 Initial volume of NaOH, mL 20.20 22.05 23.93 Final volume of NaOH, mL 22.03 23.89 25.8 Molarity of carbonic acid Average molarity of carbonic acid
What are the equivalents of 43.50 milliliters of di(K2Cr207) potassium chromate 0.07 molar 8.65 mm2 .equivalent 6.09 mmequivalent to 2 3.25 mmequivalent O
find the total hardness for water of lake contains (9.83 x10* ( m) of hco3, (1.25x 10 m) of mg*2,(1.25x10*'m) of ca*2 ,and (0.001 m) co,5. it has a ph value of 10
Students measured the concentration of HCl in a solution by titrating with different indicators to find the end point. (Use the table to find critical F values.) Mean HCl concentration (M) (+ standard deviation) Indicator Number of measurements 1. Bromothymol blue 0.09565 + 0.00170 28 2. Methyl red 0.08681 ± 0.00098 18 3. Bromocresol green 0.08641 + 0.00106 29 Is the difference between Indicators 1 and 2 significant at the 95% confidence level? O Yes O No Fenlculated clegrees of freedom Ecalculated Is the difference between indicators 2 and 3 significant at the 95% confidence level? O Yes O No Fealculated Spooled tcalculated
A pharmacist has 50 mL of a 0.5% Gentian Violet solution, what will be the final ratio strength if he dilutes this solution to 1250 mL with purified water? 1:5000 1:500 1:1000 1:8
Which zinc solution is saturated? 1x10-5 M ZnCO3 (Ksp=1.0x10-10) 4.0x10-6M Zn(OH)2 (Ksp=3.0x10-16) 1.5x10-4M ZnC2O4 (Ksp=2.7x10-8) 4.0x10-13 M ZnS (Ksp=2x10-25)