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Acid – Base Titration Q1. A chemist wishes to find the molarity of an unknown solution of HCl acid. To do this the chemist makes up a known solution of NaOH by mixing 20 grams of NaOH with 500mL of water. The chemist puts 50mL of the unknown HCl into a flask, adds five drops of phenolphthalein, and titrates by adding NaOH from a buret tube. After adding 30mL of the NaOH, the mixture changes from clear to light shade of pink. Formulas: M = # moles / Liter nMAVA=nMBVB 1. What is the molarity of the NaOH solution? (Show your work for full credit) 2. What is the molarity of the unknown acid? (Show your work for full credit) 3. Which substance is used as an indicator? 4. Which substance is the standard solution? 5. Write a balanced equation for the neutralization reaction above.

          Acid – Base Titration
Q1. A chemist wishes to find the molarity of an unknown solution of HCl acid. To do this the chemist makes up a known solution of NaOH by mixing 20 grams of NaOH with 500mL of water. The chemist puts 50mL of the unknown HCl into a flask, adds five drops of phenolphthalein, and titrates by adding NaOH from a buret tube. After adding 30mL of the NaOH, the mixture changes from clear to light shade of pink.
Formulas: M = # moles / Liter
nMAVA=nMBVB
1. What is the molarity of the NaOH solution? (Show your work for full credit)
2. What is the molarity of the unknown acid? (Show your work for full credit)
3. Which substance is used as an indicator?
4. Which substance is the standard solution?
5. Write a balanced equation for the neutralization reaction above.

Acid – Base Titration
Q1. A chemist wishes to find the molarity of an unknown solution of HCl acid. To do this the chemist makes up a known solution of NaOH by mixing 20 grams of NaOH with 500mL of water. The chemist puts 50mL of the unknown HCl into a flask, adds five drops of phenolphthalein, and titrates by adding NaOH from a buret tube. After adding 30mL of the NaOH, the mixture changes from clear to light shade of pink.
Formulas: M = # moles / Liter
nMAVA=nMBVB
1. What is the molarity of the NaOH solution? (Show your work for full credit)
2. What is the molarity of the unknown acid? (Show your work for full credit)
3. Which substance is used as an indicator?
4. Which substance is the standard solution?
5. Write a balanced equation for the neutralization reaction above.

Added by Eugenia T.

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