Table 2. Data on Sample Analysis Volume of water sample (mL) : 10.00mL Trial Volume of EDTA (mL) ppm CaCO3 1 0.19 0.16 3 0.19 Average ppm CaCO3
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- An exhausted zeolite softener was regenerated by passing 100 litres, of NaCl. Solution containing 150 gm per lit. of NaCl. How many lit. of a sample of H2O of hardness 300 ppm can be softened by this softener? (Given at wts. for C = 12, O = 16, Na = 23, CI = 35.5, Ca = 40).Determine the solubility of KIO4 in water. Volume of saturated KIO4 in conical flask is 25.0 ml,KI is 2g,H2SO4 (3.0M) is 20.0 ml added to KI solution , volume of 0.200 M sodium thiosulphate used for titration is 8.00 ml.and if mean ionic activity co efficient,y+- of KIO4 in the saturated solution is 0.85 ,what is Ksp. .The concentration of a solution of EDTA was determined by standardizing against a solution of Ca2+ prepared from the primary standard CaCO3. A 0.4302g sample of CaCO3 was transferred to a 60mL volumetric flask, dissolved using a minimum of 6 M HCl solution, and diluted to volume. A 44mL portion of this solution was transferred into a 250-mL Erlenmeyer flask and the pH adjusted by adding 5 mL of a pH 10 NH3-NH4 L buffer containing a small amount of Mg2+ EDTA. After adding calmagite as a visual indicator, the solution was titrated with the EDTA, requiring 632mL to reach the end point. Calculate the molar concentration of the titrant
- What is the percentage of Nickel in an ore if, when analyzed by the cyanide method, 20.00mL of KCN solution (containing 1.00mmol of AgNO3 per milliliter) are used? Wt of sample used = 0.2500gwhat mass in grams of Na2S2O3 is needed to dissolve 4.7 g of AgBr in a solution volume of 1.0 L given that Ksp for AgBr is 3.3 x 10^-13 and Kf for [Ag(S2O3)2]^3- is 4.7 x 10^13?What is the concentration of ions in the soil solution after fertilizer application? Suppose that 122 pounds of K+ were applied per acre, then a gentle rain soaked the top 10 inches of soil to field capacity, which for the given soil was about 16% water by volume. If the K+ was applied as KCl, it is plausible that it all dissolved and distributed relatively uniformly with the infiltrating water. If so, then what was the K+ concentration in the soil solution in mol K+/L solution? Note that the volume can be computed like we do for an acre-furrow-slice (AFS), as area times depth. This is going to be a relatively small number, so please report your answer in mol K+/L solution to at least 5 decimal places.
- A piece of an unknown weighing 12.50is placed in 49.7cm of water in a cylinder. The water level increases to 69.0cm3. whats the calculated value for the drnsity of the solid in g ml-1A 25.00 mL aliquot (a portion or part) of the standard Ca (II) solution (prepared by dissolving 0.3139 g CaCO3 in water and diluted to 250 mL) reacts with 27.25 mL of the EDTA solution. What is the molarity of the EDTA? Show calculation below.A 46.4046.40 mL aliquot from a 0.4850.485 L solution that contains 0.3500.350 g of MnSO4MnSO4 (MW=151.00MW=151.00 g/mol) required 35.235.2 mL of an EDTA solution to reach the end point in a titration. What mass, in milligrams, of CaCO3CaCO3 ( MW=100.09 MW=100.09 g/mol) will react with 1.691.69 mL of the EDTA solution?