A 500-ml volumetric flask contains 150 ml of 0.200 N H2SO4. By adding a more concentrated H2SO,the solution is brought to the mark and after mixing is found to be 0.150 M . What was the normality of the acid solution? 2.If 44.97 ml of a solution of HCl are equivalent to 43.76 ml solution of NaOH, and if 49.14 ml of the latter will neutralize 0.2162 g of KHC2O4.H2C2O4.2H2O, what volume of water should be added to a liter of the HCl in order to make it 0.0500 N? 3.A mixture of Na2CO3 and BaCO3 weighing 0.2000 g requires 30.0 ml of 0.1000N acid for complete neutralization. What is the percent of each component in the mixture? 4.Calculate the percentage CH3COOH in a sample of vinegar from the following data.Sample = 15.00 g, NaOH used = 43.00 ml ; 0.600 N H2SO4 used for back titration =0.250 ml ; 1.00 ml NaOH is equivalent to 0.0315 g H2C2O4. 2H2O. 5.A mixture contains Na2CO3, NaOH and inert matter. A sample weighing 28.85 ml of 0.5000N HCl to reach the endpoint and an additional 23.85 ml to reach the methyl orange end point. What are the percentages Na2CO3 and NaOH 6.A sample is known to consists of NaOH, or NaHCO3 or Na2CO3 or possible compatible mixture of these, together with inert matter. With methyl orange, a 1.100 g sample requires 31.4 ml of HCl( 1.000ml is equivalent to 0.0140 g CaO). With phenolphthalein , the same weight of the sample requires 13.3 ml of the acid. Calculate the percent inert matter in the sample ( ans. 17.7%)
1.A 500-ml volumetric flask contains 150 ml of 0.200 N H2SO4. By adding a more concentrated H2SO,the solution is brought to the mark and after mixing is found to be 0.150 M . What was the normality of the acid solution?
2.If 44.97 ml of a solution of HCl are equivalent to 43.76 ml solution of NaOH, and if 49.14 ml of the latter will neutralize 0.2162 g of KHC2O4.H2C2O4.2H2O, what volume of water should be added to a liter of the HCl in order to make it 0.0500 N?
3.A mixture of Na2CO3 and BaCO3 weighing 0.2000 g requires 30.0 ml of 0.1000N acid for complete neutralization. What is the percent of each component in the mixture?
4.Calculate the percentage CH3COOH in a sample of vinegar from the following data.Sample = 15.00 g, NaOH used = 43.00 ml ; 0.600 N H2SO4 used for back titration =0.250 ml ; 1.00 ml NaOH is equivalent to 0.0315 g H2C2O4. 2H2O.
5.A mixture contains Na2CO3, NaOH and inert matter. A sample weighing 28.85 ml of 0.5000N HCl to reach the endpoint and an additional 23.85 ml to reach the methyl orange end point. What are the percentages Na2CO3 and NaOH
6.A sample is known to consists of NaOH, or NaHCO3 or Na2CO3 or possible compatible mixture of these, together with inert matter. With methyl orange, a 1.100 g sample requires 31.4 ml of HCl( 1.000ml is equivalent to 0.0140 g CaO). With phenolphthalein , the same weight of the sample requires 13.3 ml of the acid. Calculate the percent inert matter in the sample
( ans. 17.7%)
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