Reference no: EM132527595
A hydrocarbon with Mr = 86 is 83.7 % carbon by mass. Calculate the empirical and molecular formula of the hydrocarbon. Draw the skeletal formula of five of the possible structural isomers of the hydrocarbon.
A student discovered a jar containing an unlabelled organic acid. They decided to find the identity by performing a titration. First, they dissolved 6.50g of the solid acid and made up to 1000 cm with de-ionised water. They then took 25 cm' aliquots and titrated against 0.100 moldm sodium hydroxide solution. They found it required 27.55 cm' to reach the end point.
Please note all the acids are diprotic and react with NaOH in the following way:
2NaOH + H,X Na,X + 2H,0
i) Calculate the moles of NaOH required
ii) Work out the moles of acid reacting in each titration
iii) Now calculate the moles of acid in the original 1000cm' sample
iv) Using the mass, calculate the Molar Mass of the acid, H,X
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