20 ml of the solution containg `Na_(2)CO_(3)` and `NaHCO_(3)` is titrated with `0.1MHCI` using Phenolphthalein indicator the end point was `10ml. 20ml` of the same solution is titrated with `0.1M HCI`, the end point was 25ml with Methylorange indicaor from the begining. `NaHCO_(3)+HCl rarr NaCl +H_(2)O +CO_(2)` `Na_(2)CO_(3)+2HCl rarr 2NaCl +CO_(2) +H_(2)O` What amount of `NaOH` is required to convert `NaHCO_(3)` to `Na_(2)CO_(3)` in 1 litre of solutionA. `2g`B. `20g`C. `1g`D. `0.5g`

20 ml of the solution containg `Na_(2)CO_(3)` and `NaHCO_(3)` is titra

1.	20 ml of the solution containg `Na_(2)CO_(3)` and `NaHCO_(3)` is titrated with `0.1MHCI` using Phenolphthalein indicator the end point was `10ml. 20ml` of the same solution is titrated with `0.1M HCI`, the end point was 25ml with Methylorange indicaor from the begining. `NaHCO_(3)+HCl rarr NaCl +H_(2)O +CO_(2)` `Na_(2)CO_(3)+2HCl rarr 2NaCl +CO_(2) +H_(2)O` What amount of `NaOH` is required to convert `NaHCO_(3)` to `Na_(2)CO_(3)` in 1 litre of solutionA. `2g`B. `20g`C. `1g`D. `0.5g`
Answer» Correct Answer - C `NaHCO_(3)+NaOH rarr Na_(2)CO_(3) +H_(2)O` 84g of `NaHCO_(3)` requires 40g of `NaOH` `2.1g` of `NaHCO_(3)` requires? `= (40)/(84) xx 2.1 = 1g`

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Silver metal in ore is dissolved by potassium cyanide solution in the presence of air by the reaction `4 Ag + 8KCN +O_(2)+2H_(2)O rarr 4K[Ag(CN)_(2)]+4KOH`A. The amount of KCN required to dissolve 100g of pure Ag is 120gB. The amount of oxygen used in this process is `0.742g`C. The mount of oxygen used in this process is `7.40g`D. The volume of oxygen used at STP is `5.20` lit.
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1.575 g of oxalic acid `(CO OH)_(2).xH_(2)O` are dissolved in water and the volume made up to 250 mL. On titration 16.68 mL of this soltuion requires 25 mL of `(N)/(15)NaOH` solution for complete neutralisation. Calculate x.
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Certain " mol of "HCN is oxidised completely by 25 " mL of " `KMnO_(4)`. The products are `CO_(2)` and `NO_(3)^(ɵ)` ion. When all `CO_(2)` is passed through lime water , 1 g of `CaCO_(3)` is obtained the molarity of the `KMnO_(4)` used isA. `1.44M`B. `0.72M`C. `0.36M`D. `0.8M`
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