Data Table. Acid-Base Reactions. Row A 1 2 3 4 5 6
HCl pH: pH: pH: pH:
# drops NaOH
B
CH3COOH pH: pH: pH: pH: pH:
# drops
C
C2H2SO4 pH: pH: PH: pH: pH: pH:
# drops NaOH
D
H3PO4 pH: pH: PH: pH: pH: pH:
# drops NaOH
a. Visually analyze the wells in the plate. What information can be gleaned from each well based on the color of the BTB indicator after each reaction has occurred? How do you know if neutralization has occurred?
b. What factors determine if neutralization occurs during an acid-base reaction?
c. Is the pH at the equivalence point always equal to 7? Explain your answer based on your experimental observations. Include a discussion of equivalence point pH values for strong versus weak acids.
d. In all the chemical reaction performed, neutralization occurs when the pH is neutral (7) or basic (>7). Did any of the reaction not result in a color change of the BTB indicator from yellow (acid) to blue (base)? Explain why neutralization may not have occurred in one or more reactions.