Do Now - AP - Molecular Structure & pKa/PH

At what pH would all three indicators appear as yellow?

• 1.7

• 2.7

• 4.7

• 8.7

Phenolphthalein is pink in an aqueous solution having a pH of

• 2

• 7

• 5

• 12

Based on the results of testing colorless solutions with indicators, which solution is MOST acidic?

• a solution in which bromthymol blue is blue

• a solution in which bromcresol green is blue

• a solution in which phenolphthalein is pink

• a solution in which methyl orange is red

Phenol Red or HPhR is an acid base indicator with a pKa around 7.5, this indicator would be most suitable to observe the equivalent point of which of the following titrations?

• HCl with Sr(OH)₂

• HCl and NH₃

• HC₂H₂O₂ and NH₃

• HC₂H₂O₂ and NaOH

Phenol Red or HPhR is an acid base indicator with a pKa around 7.5, if the solution that it is found in yellow in color, which of the following are true?

• The deprotonated form is most common

• The solution is basic

• The solution is acidic

• The protonated form is most common

Phenol Red or HPhR is an acid base indicator with a pKa around 7.5, match the following.

• pH = 7.5

• More PhR^- than HPhR

• pH = 8.2

• More HPhR than PhR^-

• Ph = 3.4

• HPhR = PhR^-

Which of the following is the strongest carbon based acids?

• H₂CO₃

• H₂CO₂

• H₂CO

• H₂C

Which of the following acids would have the largest Ka value?

• 
• 
• 
• 

Which of the following acids' conjugate base form with have the largest Kb?

• 
• 
• 
• 

Which of the following would be the strongest parts of the amino acid picture would be the most basic?

• Lysine, least polarization away from the bottom nitrogen

• Arginine, least polarization away from the bottom nitrogen

• Arginine, most polarization towards the bottom nitrogen

• Lysine, most polarization towards the bottom nitrogen

• Histidine, most polarization towards the bottom nitrogen