A 0,467 g sample containing sodium bicarbonate (a monoacidic base) and titrated with a standard solution of HCl, requairing 40,72 ml. The hydrocloric acid was standarized by titrating 0,1876 g sodium carbonate, wich required 37,86 ml. Calculate the percent sodium bicarbonate in the sample.Solution :NHCl = meq NaHCO3 = mg/BE (BM)mL HCl mL

Persen NaHCO3 = ....................

Example

ProblemsCalculate the molar concentration of all the cations and anions in a solution prepared by mixing 10.0 mL each of the following solutions: 0.100 M Mn(NO3)2, 0.100 M KNO3, 0.100 M K2SO4.Calculate the grams of each substance required to prepare the following solution: (a) 250 mL of 0.100 M KOH (b) 1.00L of 0.0275 M K2Cr2O7 (c) 500 mL of 0.500 M CuSO4How many milliliters of concentrated hydrochloric acid, 38% (wt/wt), specific gravity 1.19, are required to prepare 1L of a 0.100 M solution

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ProblemsHow many milliliters of 0.10 M of H2SO4 must be added to 50 mL of 0.1 M NaOH to give a solution that is 0.050 M in H2SO4? Assumes volumes are additive.Solution

ProblemsA preparation of soda ash is known to contain 98.6% Na2CO3. If a 0.678 g sample requires 36.8 ml of sulfuric acid to complete neutralization, what is the molarity of the sulfuric acid solution?A sample of USP grade citric acid (H3C6O7, three titratable protons) is analyzed by titrating with 0.1087 M NaOH. If a 0.2678 g sample requires 38.31 ml for titration, what is the purity of the preparation? (USP requires 99.5%)

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ProblemsA solution is prepared by dissolving 7.82 g NaOH and 9.26 g Ba(OH)2 in water and diluting to 500 ml. What is the normality of the solution as a base?What weight of arsenic trioxide, As2O3, is required to prepare 1L of 0.1000 N arsenic (III) solution?The sulfur content of steel sample is determined by converting it to H2S gas, absorbing the H2S in 10 ml of 0.00500 M I2, and then back titrating the excess I2 with 0.00200M Na2S2O3. If 2.6 ml Na2S2O3 is required for titration, how many milligrams of sulfur are contained in the sample?A potassium permanganate solution is prepared by dissolving 4.68 g KMnO4 in water and diluting to 500 ml. How many milliliters of this will react with the iron in 0.500 g of ore containing 35.6% Fe2O3?

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