Chemical Test to Distinguish between Hydrocarbons

Question

Describe a chemical test to distinguish between hydrocarbons with the following molecular formula C₄H₁₀ and C₄H₈ respectively.

Answer

Add drops of acidified KMnO₄/K₂Cr₂O₇ and bromine water to the two separately. C₄H₈ decolourises bromine water / K₂Cr₂O₇ and bromine water to the two separately. K₂Cr₂O₇4H₁₀ does not.

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Q. 20.0cm³ of a solution containing 4g per litre of sodium hydroxide was neutralized by 8.0cm³ of dilute sulphuric (VI) acid. Calculate the concentration of sulphuric (VI) acid in moles per litre Na=23, 0=16 H=1 s=32. Q. 12.0 cm³ of 0.05 M hydrochloric acid reacted with calcium hydrogen carbonate to form calcium chloride, water and carbon IV oxide. Write the chemical equation for the reaction. Calculate the number of moles of hydrochloric acid used. Determine the mass of calcium hydrogen carbonate used. (Ca = 40, C =12, H = 1,O=16). Q. A compound has an empirical formula C₃H₆O and a relative formula mass of 116.a. Determine its molecular formula (H = 1.0, C = 12.0, O = 16.0). b. Calculate the percentage composition of carbon by mass in the compound.

Chemical Test to Distinguish between Hydrocarbons

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Chemical Test to Distinguish between Hydrocarbons

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