Answer the following questions related to H20. Substance AG°, at 298 K(kJ/mol) -237.2 H2O H2O) -228.4 a. Using the information above, calculate Agº for the following reaction at 298 K:

Calculate the expected ph values of the buffer systems from the experiments (a, b,c, d), using the henderson- hasselbalch equation, ph-pka+log[a-]/[ha]. use for pka values carbonic acid= 6.37, and acetic acid= 4.75.

What is the result of multiplying (2.5 × 1010) × (2.0 × 10-7)? a. 5.0 × 103 b. 5.0 × 10-3 c. 5.0 × 1017 d. 5.0 × 10-17

Avariable that is not being directly tested during an experiment should be