Acid Base Titration Curves

A chemist claimed that in Experiment 2, the pH of the sample solution was greater at a value of 0.2 mL of titrant added than at a value of 1.8 mL of titrant added. Do the results of Experiment 2 support this claim?

• No; at a value of 0.2 mL of titrant added, the sample solution was yellow, and at a value of 1.8 mL of titrant added, the sample solution was blue.

• No; at a value of 0.2 mL of titrant added, the sample solution was blue, and at a value of 1.8 mL of titrant added, the sample solution was yellow.

• Yes; at a value of 0.2 mL of titrant added, the sample solution was yellow, and at a value of 1.8 mL of titrant added, the sample solution was blue.

• Yes; at a value of 0.2 mL of titrant added, the sample solution was blue, and at a value of 1.8 mL of titrant added, the sample solution was yellow.

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If it takes 54 mL of 0.1 M NaOH to neutralize 125 mL of an HCl solution, what is the concentration of HCl?

• 0.043 M

• 23.148 M

• 0.231 M

Tags

NGSS.HS-PS1-7

Calculate the volume of a 0.15 M Ba(OH)2 solution required to completely neutralize 45 ml of a 0.29 M HNO3 solution.

• 43.5 ml

• 87 ml

• 23.3 ml

• 51.9 ml

A process used to find the molarity of an acid or base solution.

• molarity

• titration

• endpoint

• neutralization

What is the concentration of a HCl solution if 24.7 ml of HCl are completely neutrilized by 35.8 ml of a 0.25 M NaOH solution?

• 0.362 M

• 3.62 M

• 0.172 M

• 35.4 M

The equivalence point is the

• theoretical halfway point of the reaction

• empirically derived completion of the reaction using phenolphthalein

• theoretical completion of the reaction

• the actual measurement based on the presence of the indicator

In addition to neutralization, what other class of reaction occurs between KHP and NaOH solutions?

• combustion

• double replacement

• single replacement

• composition

If NaOH solution added to a solution at physiological pH raises the pH to the phenolphthalein end point (around pH 8.35), the acidity of the solution has

• increased 10x

• decreased 1x

• decreased 10x

• increased 1x

If the Erlenmeyer flask contains acidic solution and a few drops of phenolphthalein, its color will be

• pink

• blue

• red

• colorless

Has more H+ ions than OH- ions

• Acid

• Neutral

• Base