Formic acid is the simplest carboxylic acid, HCOOH. It is the cause of pain in bee and ant stings and nearly a million tonnes are made each year because it is a good preservative. In water, formic acid behaves as a weak acid:

HCOOH_(aq) + H₂O_(l)  ⇌  HCOO^-_(aq) + H₃O⁺_(aq)

The concentration of formate ions (HCOO^-) is increased by adding sodium formate (HCOONa). Which of the statements below is the best explanation of the process of returning to equilibrium after the sodium formate has been added?

Enter your answer in J·mol^-1·K^-1 to one decimal place. Do not enter units.

What condition must be true for a chemical reaction to be spontaneous?

A spontaneous reaction is always exothermic.

Entropy is a measure of:

Using the following S^o values 

H₂(g),      S^o = 130.58 J·mol^-1·K^-1

C₂H₄(g),  S^o = 219.4 J·mol^-1·K^-1

C₂H₆(g),  S^o = 229.5 J·mol^-1·K^-1

calculate ΔS^o in J mol^-1 K^-1 for the reaction below.

C₂H₄(g) + H₂(g) → C₂H₆(g)

Enter your answer in the box.  Do not enter units.

Conclusion

You should finish your report with a short statement commenting on what was achieved, and what the final numerical result/s were. Think of it as a spoiler for your whole lab report! Your conclusion should answer all parts of your aim.

For example:

If the aim is: Determine the concentration of Vitamin C in a fruit juice via a redox titration against N-bromosuccinimide.

The conclusion might be: Berri orange juice (2000 μL aliquots, in triplicate) was titrated against a 0.104 M solution of N-bromosuccinimide. The concentration of Vitamin C in the fruit juice was determined to be 55.0 mg/L.