L89 Titration Lab

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

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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.

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What pH numbers do you predict for the final solutions?

1. 1. pH A: _

2. 2. pH B: _

3. 3. pH C: _

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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?

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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?

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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?

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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?

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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?

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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?

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

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