Based on this titration curve for a 0.1 M monoprotic weak acid with 0.1 M NaOH, what is the pH at the equivalence point of the titration?

Based on this titration curve for a 0.1 M monoprotic weak acid with 0.1 M NaOH, what is the best indicator for this titration? 

Based on this titration curve for a 0.1 M monoprotic weak acid with 0.1 M NaOH, what is the pK_a of the acid?

This graph shows measurements of the absorbance of light for solutions containing different concentrations of Fe³⁺. Select the one statement below which best describes the graph. 

Is the statement below true or false?

For a graph of temperature (y-axis) versus time (x-axis), a suitable label for the y-axis would be T/°C.

Is the statement below true or false?

The title on a graph should be of the format 'quantity on vertical axis versus quantity on horizontal axis.'

A double-bond always consists of what?

What type(s) of atomic orbitals are pictured below?

How many d orbitals can exist when n = 4?

Consider the energy level diagram sketch below.

Which of the transitions, a) - e), represents a hydrogen atom in an excited state emitting light and ending up in its ground state?