A group of students is comparing the graphs of strong acid-strong base and weak acid-strong base titration curves, where the base is the titrant. Which statement inaccurately describes a difference between the two curves? The initial pH for the weak acid-strong base curve is higher than the initial pH for the strong acid-strong base curve.
At the equivalence points, the pH of the weak acid-strong base is greater than the pH of the strong acid-strong base.
At the half-equivalence points, the pH of the weak acid-strong base is greater than the pH of the strong acid-strong base.
The steep-rise interval in the weak acid-strong base curve is more pronounced than in the strong acid-strong base curve.

consider the reaction below.

 no rx

at 500 k, the reaction is at equilibrium with the following concentrations.

[pci5]= 0.0095 m

[pci3] = 0.020

[ci2] = 0.020 m

what is the equilibrium constant for the given reaction?

0.042

0.42

2.4

24

definition

                    entropy is a measure of the randomness or the extent of disorder of a chemical process.

                      enthalpy is a measure of the heat change of a reaction occurring at a constant pressure.

measurement units:

                        entropy is measured in joule per kelvin (jk⁻¹)   whereas enthalpy is measured in joule per mole (jmol⁻¹)

requirements:

                            entropy has no requirements or limits, and its change is measured by the division between the heat change of the chemical process and the temperature.

                              in contrast, enthalpy can only be related to the heat change of the reaction under standard conditions.

c. 4.54 x 10–12 j happens to be correct