Questions: 1. Write the chemical reaction that occurs during the titration 2. Lo
ID: 559222 • Letter: Q
Question
Questions: 1. Write the chemical reaction that occurs during the titration 2. Locate in the experiment the definition of equivalence point. Write it here. 3. Read the Plotting the Results section in the experiment and locate the equivalence point on the curve you've drawn using the method described. Mark it on your graph. 4. Using the titration curve you've just drawn determine how many mL of base were required to reach the equivalence point? 5. How many moles of base does this many ml. correspond to? Show calculation. 6. How many moles of acid are contained in your 25.00 ml sample? 7. What is the concentration of your sample in M? Show calculation.Explanation / Answer
1) The chemical reaction between sodium hydroxide (NaOH) and hydrochloric acid (HCl) is as below.
NaOH (aq) + HCl (aq) --------> NaCl (aq) + H2O (l)
2) The equivalence point of an acid-base titration experiment is defined as the volume of the titrant added when the chemical equivalents ratio of NaOH and HCl are equal, i.e, at the equivalence point, the system contains equal chemical equivalents of the acid and the base.
3) Plot the titration curve with the data supplied.
The graph is plotted above; the equivalence point is the midpoint of the steeply rising portion of the curve, i.e, when there is a sharp jump in pH from 4.16 to 9.56.
4) The volume of HCl required to reach the equivalence point is given by the sharp jump in pH. The volume required is 29.8 mL.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.