Multiple Choice
In an acid-base test using litmus paper, what color does blue litmus indicate when the solution is basic?
18. Aqueous Equilibrium
Acid-Base Indicators
Back18. Aqueous Equilibrium
Acid-Base Indicators
- Multiple ChoiceBromothymol blue is an acid-base indicator that changes color over a certain pH range. At approximately which pH value would bromothymol blue appear blue?1views
- Multiple ChoicePhenolphthalein is an acid-base indicator. What color does phenolphthalein appear in a basic (alkaline) solution?1views
- Multiple ChoiceWhich acid-base indicator is yellow in a solution with a pH of 9.8?26views
- Multiple ChoiceBromothymol blue is an acid-base indicator that changes color over a specific pH range. In which pH condition does bromothymol blue appear yellow?1views
- Multiple Choice
Chemistry student is using an indicator with a pKa of 4.7 for the titration of a strong acid with strong base. Calculate the pH range at which the indicator will change colors.
a) 2.7–3.5 b) 10–11 c) 4.7–8.7 d) 3.7–5.7 e) 2.7–5.8
610views2rank - Multiple Choice
Bromophenol blue (pKa = 4.1) is a common acid-base indicator. It is yellow in its acidic form and blue in conjugate base form. If the solution being titrated has a pH = 4.0, what color would the bromophenol blue indicator possess?
a) yellow b) orange c) blue d) green e) purple
2372views2rank1comments - Open Question
When CO2 combines with water it forms carbonic acid. How does this explain the phenol red result?
445views - Open Question
A substance that changes color in the presence of an acid or base is called a(n)
336views - Multiple ChoiceWhat is the pH of the solution after titrating 25.00 mL of 0.22 M HC2H3O2 with 25.00 mL of 0.22 M NaOH?211views
- Multiple ChoiceA 60.0 mL solution of 0.115 M sodium hypochlorite (NaOCl) is titrated with 0.222 M NaOH. Calculate the pH of the solution after 6.05 mL of NaOH is added. The pKa of hypochlorous acid (HOCl) is 7.53.179views
- Multiple ChoiceWhat is the pH at the equivalence point for the titration of 20.0 mL of 0.500 M acetic acid (HC2H3O2) with 0.350 M potassium hydroxide (KOH), given that the Ka for acetic acid is 1.8 × 10^-5?228views
- Multiple ChoiceComplete neutralization of 12.5 mL of Sr(OH)₂ requires 36 mL of 0.1 M HCl. What is the concentration of the Sr(OH)₂ solution?147views
- Multiple ChoiceConsider the titration of 26.00 mL of 0.400 M formic acid with 0.380 M NaOH. Calculate the pH of the solution at the half-equivalence point.134views
- Multiple ChoiceDuring the titration of 26.00 mL of 0.400 M formic acid with 0.380 M NaOH, what is the pH of the solution at the half-equivalence point?144views