A 15.00 g sample containing mixed alkali and other inert components was dissolved and diluted to 300 ml with water. A 20 ml aliquot was titrated with 5.02 ml of 0.5352 M HCI to reach PHP endpoint. Another 20 mL aliquot was titrated to the BCG endpoint, using up 18.87 ml of titrant in the process. The volume of titrant needed to neutralize NaOH is 5.02 mL The volume of titrant needed to neutralize Na,CO, is 9.44 v mL The volume of titrant needed to neutralize NaHCO, is 9.44 v mt The percent weight of NaOH is Select [Select] The percent weight of Na CO,O 10.75 17.56 The percent weight of NaHCO 28 48 39 70 MM NaOH 40 mol NaCO

A 15.00 g sample containing mixed alkali and other inert components was dissolved and diluted to 300 ml with water. A 20 ml aliquot was titrated with 5.02 ml of 0.5352 M HCI to reach PHP endpoint. Another 20 mL aliquot was titrated to the BCG endpoint, using up 18.87 ml of titrant in the process. The volume of titrant needed to neutralize NaOH is 5.02 mL The volume of titrant needed to neutralize Na,CO, is 9.44 v mL The volume of titrant needed to neutralize NaHCO, is 9.44 v mt The percent weight of NaOH is Select [Select] The percent weight of Na CO,O 10.75 17.56 The percent weight of NaHCO 28 48 39 70 MM NaOH 40 mol NaCO

Principles of Modern Chemistry

8th Edition

ISBN:9781305079113

Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Chapter17: Electrochemistry

Section: Chapter Questions

Problem 80AP

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The total cation content of natural water is often determined by exchanging the cations for hydrogen ions on a strong acid ion-exchange resin. A 25.00 mL sample of a natural water was diluted to 100.00 ML with distilled water, and 2.06 g of a cation - exchange resin was added. After stirring, the mixture was filtered and the solid remaining on the filter paper was washed with three 15.00 mL portions of water. The filtrate and washings required 16.30 mL of 0.0282 M NaOH to give a bromocresol green end point. a) Calculate the number of millimoles of cation present in exactly 1.00 L of sample. b ) Report the results in terms of milligrams of CaCO3 per liter. Only typed solution.
A 25.00mL wastewater sample was analyzed for its Mg2+ content using a standard gravimetric method. the sample was diluted to 3.00L and an 11.00mL aliquot was treated to precipitate magnesium as MgNH4PO4.6H2O using (NH4)2HPO4 as the precipitating agent. the precipitate was then filtered, washed, dried, and ignited resulting in a 0.1325mg Mg2P2O7 residue. How much Mg (in ppm) is present in the original sample
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An sample of eggshell that weighs 1.0014g and is 51μm thick is titrated with disodium EDTA. A solution of the 1.0014g sample and 30 mL of HCl is vacuum filtered after being mixed. The product of the filtration is added to a 250mL volumetric flask and is diluted by being filled to the 250 mL mark with deionized water. 10 mL of this diluted mixture is mixed with EBT indicator and titrated with 0.05 M disodium EDTA. It takes 12.3 mL of disodium EDTA to notice a change in color. What percent mass of calcium is in the eggshell?
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