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what is the total alkalinity in mg L^-1 and mmol L^-1 CaCO3 for a sample requiring 21.25 mL of 0.0100 M H2SO4? (100mL trial)
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- A50.0 mL aliquot of solution contairing 0.450 g of MgSO4 [FM 120.27) in 0.500 L required 376 mL of EDTA solution for titration. How many miligrams of CaCO3 (FM 106.09) will react with 100 mL of this EDTA solution?A 0.500-g sample containing BaBr2 (FM = 297.14) is dissolved in 50 mL of distilled water. Titrating with 0.0400 M AgNO3 requires 25.00 mL to reach the Mohr endpoint. A blank titration requires 0.50 mL to reach the same endpoint. Calculate the %w/w BaBr2 in the sample. Please provide a complete solution.0.1500 g of an unknown sample was passed through a column of Amberlite IR-120(+) resin and titrated with 0.2050 M NaOH. If 9.75 mL of titrant was required to reach phenolphthalein endpoint, what is the molecular weight of the unknown substance?
- 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 50.00-mL aliquot of solution containing 0.358 of MgSO4 (FM 120.37) in 0.500 L required 38.08 mL of EDTA solution for titration. How many milligrams of CaCO3 (FM 100.09) will react with 1.00 mL of this EDTA solution?H8. a 10 ml sample containing Ni was back titarted againat 0.0575 M EDTA. 10 ml concentrated amonia was added to the sample and 100 ml of water with 0.02 indicatore. the averge of 3 titration is 14.76667 ml. what is the Ni content g/L?
- A 0.1093-g sample of impure Na2CO3 was analyzed by the Volhard method. After adding 50.00 mL of 0.06911 M AgNO3, the sample was back-titrated with 0.05781 M KSCN, requiring 27.36 mL to reach the endpoint. Report the purity of the Na2CO3 sample. [Ans. 90.9 % (w /w )]A 0.1093-g sample of impure Na2CO3 was analyzed by the Volhard Method. After adding 50.00 mL of 0.06911 M AgNO3, the sample was back titrated with 0.05781 M KSCN, requiring 27.36 mL to reach the end point. Report the purity of Na2CO3sample.A 10.00-mL aliquot of a known HCl solution (3.800 g/L) was titrated with a 4.100 g/L NaOH solution. Calculate the range of the blank corrected titration volumes using the titration data below: Blank Trial 1 Trial 2 Trial 3 Initial Volume (mL) 12.50 0.50 12.30 34.75 Final Volume (mL) 13.10 10.45 22.35 45.27
- . 100 ml boiled cooled and filtered water sample takes 9.6 ml of M/50 EDTA in titration. The Permanent hardness of the water sample in terms of ppm of CaCO3 equivalent isIf a 1.065 g sample of magnesium oxide of 84.736% were treated with 50 mL of 1.017 N sulfuric acid, what volume of 1.103 N sodium hydroxide would be required in the back titration? 1. What specific type of titration is involved? * A. Direct Acidimetry B. Direct Alkalimetry C. Residual Alkalimetry D. Residual Acidimetry 2. Which is the analyte in the problem? A. Magnesium Oxide B. Sulfuric Acid C. Sodium Hydroxide 3. What is the analyte-titrant chemical reaction involved? Weak Acid + Strong Base Weak Base + Strong Acid Strong Acid + Weak Base Strong Base + Weak Acid100 mL water sample was subjected to DO analysis using the Winkler method. The initial reading of the titrant (0.025 M Na2SO3) in the buret was 2.51 mL. The endpoint was obtained and the final reading was 7.07 mL. A blank was also titrated and 0.75 mL of the titrant was consumed. Compute for the amount of DO (mg/L) in the sample.