A mixture of Mn2, Mg*2, Zn? was analyzed as follows. The 25 mL sample was treated with 0.25 g of Hydroxylammonium chloride (a reducing agent that maintain Manganese in +2 state), ammonia buffer (pH: 10) and few drops erichrom black T indicator and then diluted to 100 ml.. It was warmed to 40 °C and titrated with 39.98 mL of 0.045 M EDTA to the blue end point. Then NaF was added to displace Mg? from EDTA complex. The liberated EDTA required 10.26 mL of standard 0.02 M Mn*2 for complex titration. After this second end point was reached, KCN was added to displace Znt2 from EDTA complex. This time the liberated EDTA required 15.47 mL of standard 0.02 M Mn*, Calculate the number mg of each metal (Mn*/ Zn2 / Mg*?) in 25 mL sample of unknown? [AM Mn: 55, Zn: 65, Mg: 24]
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Chemistry, 22.06.2019 14:00
Which of the following is true about a carbonated soft drink? . the carbon dioxide is the solvent, and water is the solute.. the water is the solution, and carbon dioxide is the solvent.. the carbon dioxide is the solution, and the water is the solvent.. the water is the solvent, and the carbon dioxide is the solute.. .
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A mixture of Mn2, Mg*2, Zn? was analyzed as follows. The 25 mL sample was treated with 0.25 g of Hyd...
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