1. Xcm^3 of hydrogen chloride gas at stp were passed into 50cm^3 of 0.2M sodium...

1. Xcm^3 of hydrogen chloride gas at stp were passed into 50cm^3 of 0.2M sodium trioxocarbonate IV solution. The excess trioxocarbonate IV was neutralised by 25cm^3 of 0.1M tetraoxosulphate VI acid . Calculate
i. the mass of excess sodium trioxocarbonate IV in g/dm^3
ii. the value of X ( molar volume of gas at stp = 22.4dm^3, sodium tioxocarbonate IV = 106 g/mol )
2. 16g of anhydrous sodium trioxocarbonate IV containing some sodium chloride as impurity were made up to 1000cm^3 of aqueous solution. 25cm^3 of the solution was neutralised by 23.50cm^3 of 0.2M HCL acid. Calculate the mass of sodium chloride impurity in the mixture.
3. A piece of limestone was added to 1000cm^3 of 0.1M tetraoxosulphate VI acid. After effervescence had stopped 35.70cm^3 of the resulting solution required 25cm^3 of 0.1M sodium hydroxide for complete neutralization. Calculate the mass of limestone added.?

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Asked by Priscilla on 11th November, 2019