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Chemistry: Post your doubts here!

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look at the thread chem p5 tips..we were discussing it a few mins ago
i just checked it,im confused about the solubility part but other than that,we find the solid by subtracting ' (D) mass of boiling tube,water and solid' from ' (C) mass of boiling tube and water' OR we find solid by subtracting ' (E) mass of water' from ' (D) mass of boiling tube,water and solid' ?? please help me out i will be very grateful :)
 
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i just checked it,im confused about the solubility part but other than that,we find the solid by subtracting ' (D) mass of boiling tube,water and solid' from ' (C) mass of boiling tube and water' OR we find solid by subtracting ' (E) mass of water' from ' (D) mass of boiling tube,water and solid' ?? please help me out i will be very grateful :)

mass of solid = D - C
 
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  • Use of the Data Booklet is relevant to this question.
    A sample of propyl ethanoate is hydrolysed by heating under reflux with aqueous sodium
    hydroxide. The two organic products of the hydrolysis are separated, purified and weighed.
    Out of the total mass of products obtained, what is the percentage by mass of each product?
    A 32.4 % and 67.6 %
    B 38.3 % and 61.7 %
    C 42.3 % and 57.7 %
    D 50.0 % and 50.0 %
Answer is C ... how?
 
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  • Use of the Data Booklet is relevant to this question.
    A sample of propyl ethanoate is hydrolysed by heating under reflux with aqueous sodium
    hydroxide. The two organic products of the hydrolysis are separated, purified and weighed.
    Out of the total mass of products obtained, what is the percentage by mass of each product?
    A 32.4 % and 67.6 %
    B 38.3 % and 61.7 %
    C 42.3 % and 57.7 %
    D 50.0 % and 50.0 %
Answer is C ... how?

Did u try it out yourself?
 
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can anyone help me with the presentation of data collected and the tables , how to make them , what should be in the table etc ?????
 
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I need some tips for calculations. for example calculations for acid-alkaline experiment
 
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Titanium(IV) oxide, TiO2, is brilliantly white and much of the oxide produced is used in the manufacture of paint. What is the maximum amount of TiO2 obtainable from 19.0 tonnes of the ore ilmenite, FeTiO3?
A 10.0 tonnes B 12.7 tonnes C 14.0 tonnes D 17.7 tonnes
 
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Titanium(IV) oxide, TiO2, is brilliantly white and much of the oxide produced is used in the manufacture of paint. What is the maximum amount of TiO2 obtainable from 19.0 tonnes of the ore ilmenite, FeTiO3?
A 10.0 tonnes B 12.7 tonnes C 14.0 tonnes D 17.7 tonnes
is there an equation given ?
 
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