In the acid-base titration part of this experiment you will be adding a standardised acid or base from a burette to the solution you are measuring the pH of using a pH meter. At the start of the titration you add the solution from the burette in 2.0 mL portions. How do you tell that you should add smaller (0.5 mL) portions for a part of the titration?

In the acid-base titration part of this experiment you will be provided with an unknown acid or base. How do you determine if the unknown is an acid or a base?

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?

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 pH at the equivalence point of the titration?

Which of the following best describes the pH values at points A, B, and C on this titration curve?

What is the pH of a buffer solution containing 1.29 mol/L ammonium chloride and 0.86 mol/L ammonia? 

pK_a (NH₄⁺) = 9.24

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.'