I want to thank your team (Jeff) for finding a new writer when you were unable to reach my existing writer to revise my paper. I appreciate your professionalism and efforts. Thanks
A packet of washing soda crystals have formed a white powder represented by the formula (Na(2)Co(3).xH(2)O) . the value of x may be found by dissolving a known quantity of the powder in water and titrating the solution with acid of known concentration. in an experiment a student weighed out 1.59g of the powder and dissolved it in water. the volume of the solution was made up to 250cubic-centimetres. 25.0cubic-centimetres of this solution was titrated with hydrochloric acid of concentration 0.1mol/cubic-decimetres . 25.6cubic-centimetres of the acid was required for complete reaction. the equation for the reaction is:
NA(2)CO(3) + 2HCL GIVES OUT 2NACL + H(2)O + CO(2)
a)calculate the number of moles of hydrochloric acid in 25.6cubic-centimetres of 0.1mol/cubic-decimetres
b)calculate the number of moles of sodium carbonate in 25.0cubic-centimetres sample of solution which reacted with the hydrochloric acid
c)how many moles of sodium carbonate were in 250cubic-centimetres of solution?
d)calculate the mass of sodium carbonate in the 250cubic-centimetres of solution (Ar:C=12,O=16,Na=23)
e)using your answer to part (d) , what mass of water was in the original powder?
f)how many moles of water were present in the original powder? (Ar:O=16.H=1)
g)using your answer to part (c) and (f), calculate the value of x
h)write a complete formula of the white powder showing the value of x
Delivering a high-quality product at a reasonable price is not enough anymore.
That’s why we have developed 5 beneficial guarantees that will make your experience with our service enjoyable, easy, and safe.
You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.Read more
Each paper is composed from scratch, according to your instructions. It is then checked by our plagiarism-detection software. There is no gap where plagiarism could squeeze in.Read more
Thanks to our free revisions, there is no way for you to be unsatisfied. We will work on your paper until you are completely happy with the result.Read more
Your email is safe, as we store it according to international data protection rules. Your bank details are secure, as we use only reliable payment systems.Read more
By sending us your money, you buy the service we provide. Check out our terms and conditions if you prefer business talks to be laid out in official language.Read more