(iv) With H^+/Cr2O72-, what is the product and name when compound R reacts?

Here is the solution to the question:

6. (b) (iv) R with $\text{H}^+/\text{Cr}_2\text{O}_7^{2-}$

From question 6. (a), compound R is $\text{CH}_3\text{CHO}$ (ethanal).
The reagent $\text{H}^+/\text{Cr}_2\text{O}_7^{2-}$ (acidified dichromate) is a strong oxidizing agent. Aldehydes are oxidized to carboxylic acids.

• Product: $\boxed{\text{CH}_3\text{COOH}}$
• Name: $\boxed{\text{Ethanoic acid}}$