First reasonable answer collects 10points! goodluck!!?

Question

A student attempted to determine d % by mass of nitrogen in Nitrochalk by d following titrimetric procedure.
2g of nitrochalk was heated with 25cm3 of 2.00M NaOH until no more NH3 was evolved.The mix. was filtered to remove d CaCO3.The filtrate was then made up to 250cm3 by adding distilled water and 25cm3 portion were titrated against 0.1M HCL.It was found that 30cm3 of acid was required to neutralize d NaOH left over.
1)From the given data,calc. d number of moles of ammonium nitrate present in the original sample of fertilizer
2)Calc. the % by mass of nitrogen in the fertilizer and
3)The % by mass of CaCO3 in d nitrochalk

Nitrochalk is a widely used fertilizer that conts NH4NO3 and CaCO3

"d %" means "the percentage by mass"

Answer 1

1) moles of NH4NO3 = moles NaOH - moles HCl

= 0.025 * 2.0 - ( 0.10 * 0.03 * 250/25 ) = 0.02 moles ans.

2) % Nitrogen = ( 0.02 * 2 / 2 ) * 100 = 2 % ans.


mass of NH4NO3 = 0.02 * 80 = 1.60 g

mass of CaCO3 = 2 - 1.60 = 0.40 g

% CaCO3 = ( 0.40 / 2 ) * 100 = 20 % ans.

Answer 2

I don't understand why you have 'density' scattered throughout your question.

A student attempted to determine density % by mass of nitrogen in Nitrochalk by density following titrimetric procedure.

Unless 'd' stands for something else?

Answer 3

This is an easy question dude.Do your own homework! Start of by writing a balanced equation

Answer 4

This sounds like you're trying to get an easy answer to your homework.

Answer 5

Do your own homework. How you going to know anything if you get others to do your work.

Answer 6

I am sorry, while I would like to help you. I really don't have the time to sit down and work this out.

(That's pretty reasonable)

Answer 7

I hope that James b will answer you !!!