Solutions Test ...

What is the percentage of carbon, by wt. in vitamin $$C$$ ?

How much concentrated solution obtained per hour?

1.0 g of moist sample of a mixture of $$KCl$$ and $$KClO_3$$ was dissolved in water and made up to 250mL. 25 mL of this solution was treated with $$SO_2$$. The chlorate was reduced to chloride and an excess of $$SO_2$$ was removed by boiling. The total chloride was precipitated as $$AgCl$$ weighing 0.1435 g. In another experiment, 25 mL of the original solution was heated with 30 mL of 0.2 N solution of ferrous sulphate and the unreacted ferrous sulphate required 37.5 mL of 0.08 N solution of an oxidising agent for complete oxidation. For the given reaction:

To determine soluble (free) $$SiO_2$$ in a rock, an alkaline extraction was carried out, as a result of which there was found $$1.52\%$$ of $$SiO_2$$ in the extract and also $$1.02\%$$ of $$Al_2O_3$$. Considering that, apart from the free $$SiO_2$$, the extract also contained the $$SiO_2$$, that had passed into it from Kaolin $$(2SiO_2, Al_2O_3)$$, the percentage of $$SiO_2$$, in the rock being analysed is $$(Si=28, Al=27)$$

How much slurry obtained per hour?

In $$200\ g$$ of a sample of olem labelled as $$109.0\% ,\ 12\ g$$ water is added. The new labelling of the oleum sample is 

When $$200\ g$$ of an oleum sample labelled as $$109\%$$ is mixed with $$300\ g$$ of another oleum sample labelled as $$118\%$$ the new labelling of resulting oleum sample becomes

A sample of oleum is labelled as $$112\%$$. In $$200\ g$$ of this sample, $$18\ g$$ water is added, The resulting solution will contain 

Vapour pressure of liquid 

An aqueous solution of sucrose is 0.5 molal. What is the vapour pressure of water above this solution ? The vapour pressure of pure water is 25.0 mm Hg at this temperature.