L89 Titration Lab

Which of the three HCl solutions has the highest molarity and is potentially the most toxic? Explain how you know.

What is happening in the solution as you add sodium hydroxide? Write or draw a chemical equation to show the reaction and upload to this question.

What pH numbers do you predict for the final solutions?

1. 1. pH A: _

2. 2. pH B: _

3. 3. pH C: _

Imagine that you have a 100 mL sample of hydrochloric acid, HCl. After adding 50 mL of 1.0 M NaOH, you detect a green color. a. How many moles of OH⁻ did you add?

Imagine that you have a 100 mL sample of hydrochloric acid, HCl. After adding 50 mL of 1.0 M NaOH, you detect a green color. b. The color of the indicator suggests that the solution is neutral. How many moles of H⁺ were neutralized?

Imagine that you have a 100 mL sample of hydrochloric acid, HCl. After adding 50 mL of 1.0 M NaOH, you detect a green color. c. What is the concentration of the HCl solution?

Imagine that 0.20 L of 0.45 M HCl neutralizes the hydroxide ions in a 50.0 mL sample of NaOH. a. How many total moles of H⁺ were added?

Imagine that 0.20 L of 0.45 M HCl neutralizes the hydroxide ions in a 50.0 mL sample of NaOH. b. How many moles of OH⁻ were neutralized?

Imagine that 0.20 L of 0.45 M HCl neutralizes the hydroxide ions in a 50.0 mL sample of NaOH. c. What is the concentration of the NaOH solution?

Describe how you can determine the concentration of an unknown hydrochloric acid solution. What do you need to know?