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A student collected the following date while using the procedure described in this module: 27.13 mL of 0.01M EDTA solution was required to reach the Erio T end point for titration of 25.00 mL of the sample water.
After boiling and filtering 100.0 mL of the water, the student diluted the filtrate to 100.0 mL with distilled water. To titrate 25.00 mL of the diluted filtrate, 26.40 mL of 0.01M EDTA solution was required.
The student precipitated the Ca+2 ion as CaC2O4 from 75.0 mL of the water sample and removed the precipitate by filtration. The student then adjusted the water sample volume to 100.0 mL. To titrate 25.0 mL of the diluted filtrate, 7.43 mL of 0.01M EDTA solution was required.(1) Calculate the total number of millimoles of Ca+2 and Mg+2 ions present in the titrated sample.(2) Calculate the total water hardness, expressed in ppm of equivalent CaCO3(3) Calculate the permanent water hardness in terms of total mmol of Ca+2 and Mg+2 ions.(4) Express the permanent water hardness in terms of ppm of equivalent CaCO3-(5) Calculate the temporary water hardness in terms of ppm of equivalent CaCO3-(6) Calculate the number of millimoles of Mg+2 ions per liter of the water.
A gas is initially at 1.2 atm, 15.0 L, and O°C. What is the final pressure when the same amount of gas is heated to 10°C and the volume changed to 20.0 L
How many grams of NH4Cl must be added to 0.490 L of 1.00 M NH3 solution to yield a buffer solution with a pH of 8.90?
the specific heat of an unknown metal is found to be 0.233 j kg. The law of dulong and petit predicts a molar heat capacity of J/K mol. Use this law to estimate the molar mass of the element.
Carbon-14 decays by beta emission with a half life of 5,730 years. Assuming a particular object originally contained 6.5 micro grams of C-14 and now contains 0.76 micro grams of C-14, how old is the object
What is the pH of a 8.80E-04 M solution of Ca(OH)2. What is the pH of a 5.52E-04 M solution of HCl
What must californium-250 be bombarded with to produce lawrencium-257 and 4 neutrons
what volume of dry hudrogen would be produced understandard conditions when 0.250 g of magnesium reacts withexcess
To titrate a 5.00 mL sample of a saturated aqueous solution of sodium oxalate, it requires 25.31 mL of 0.02233 M potassium permanganate. How many grams of sodium oxalate would be present in 250.0 mL of the saturated solution
Write the balanced neutralization reaction between H2SO4 and KOH in aqueous solution. .150 L of .430 M H2SO4 is mixed with 0.100 L of .230 M KOH. What concentration of sulfuric acid remains after neutralization
Determine the sign of ΔS sys and ΔS surr for each chemical reaction.2CO(g)+O 2 (g)?2CO 2 (g)ΔH ° rxn = -566.0 kJ. Choose from:
show the acid catalyzed enamine product formation from 2-butanone and diethylamine
Identify the alkaline Earth metal. Express your answer as a chemical formula. Write the formula for the metal hydride. Express your answer as a chemical formula.
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