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
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- 100 ml of a sample water on titration with N/50 H 2 SO 4 required 9.8 ml of the acid to Phenolphthalein end point and 13 ml of the acid to Methyl orange end point. Determine the type and amount of alkalinity present in the water sample? (Please solve it with details and as soon as possibleOn the redox titration experiment, Standardization of Na2S2O3 with KIO3 standard solution, what can be replaced KIO3 to make safer solvent and auxiliaries( reduced toxic waste)? explain why?In the conductivity test, _____________________ is going to result to a brightly lit light bulb. a. 70% v/v ethanol b. 1.0 M citric acid c. Mixture of 10.0 mL 1.0 M Mg(OH)2 and 10.0 mL 1.0 M HNO3 d. Glacial acetic acid
- What is hardness of water? How can it be determined by using EDTA in a laboratory? Inan experiment to determine the hardness, a sample 100 ml of water required 15 ml of N/50EDTA. 100ml. of water after boiling for 15 minutes and making up to 100 ml again withdistilled water, required 8 ml of EDTA for titration. Calculate total, temporary and permanenthardness of waterMaria wants to determine the concentration of Calcium ions in water from their well. She used a 100.0 mL water sample, and its pH was adjusted to 10 and 3 drops of the indicator were added. She used 2.500 mL of 0.09945 M EDTA to reach the endpoint. What is the concentration (mg/L) of calcium ion in the sample? Identify the classification of water given the reference. Reference: 0 to 60 mg/L Ca is classified as soft, 61 to 120 mg/L as moderately hard; 121 to 180 mg/L as hard; and more than 180 mg/L as very hardA student trying to determine the Ksp for Calcium hydroxide used 10.15 mL of 0.050 M HCl to neutralize the initial volume of 15.00 mL Ca(OH)2 solution. If the accepted value of the Ksp for Ca(OH)2 is 6.5 x 10-6 calculate the percent error from this experiment.
- Determine the lime and soda ash does, in mg/L as CaO and Na2CO3, to soften the Thames River to a final hardness of less than 125 mg/L as CaCO3. Assume that all the alkalinity is bicarbonate and that the lime is 90% pure and the soda ash is 97% pure. (4.21)Determine the total hardness of water (ppm CaCO3; MM: 100.09 g/mole) if 100.0mL sample of drinking water required 38.41mL of 4.65 x 10-3 M EDTA for titration. 179 ppm CaCO3 357 ppm CaCO3 452 ppm CaCO3 733 ppm CaCO3A standard solution is prepared by completely dissolving 0.4 grams of CaCl2 and 0.2 grams of MgCO3 salts in 1-Liter DI water in a glass bottle closed to the atmosphere. The equilibrium pH of the standard solution is adjusted to 7.3 using acid-base solutions. Assuming the amounts of acid and based used in the initial pH adjustment is negligible, calculate : Temporary and permanent hardness of the solution as mg/L CaCO3. Total alkalinity and acidity as mg/L CaCO3. Useful information for problem :
- In how much volume of diluted sulfuric acid should you dissolve a multivitamin tablet of approximately 1700 mg of Vitamin C to back analyze 10.00 mL of that solution, with 25.00 mL of 0.01 M KIO3 and 0.04 M thiosulfate to use approximately 8-10 mL of titrant ? You have 25, 50, 150, 250 and 500 mL flasks.A 100 ml sample of water require 20 ml of 0.02 N EDTA for titration using EBT as indicator.100 ml of same water sample boiled and precipitate removed by filtration, the filtrate requires 9 ml of 0.02 N EDTA for titration. Calculate the total hardness, permanent hardness and temporary hardness of water sample.The distribution constant for iodine between an organic solvent and H2O is 85. Find the concentration of iodine remaining in the aqueous layer after extraction of 50mL of 1.00x10-3 M iodine with two portion of 25mL organic solvent?