A student titrates an unknown amount of potassium hydrogen phthalate ( KHC8H4O4, often abbreviated KHP) with 21.93 mL of a 0.1500-M NaOH solution. KHP (molar mass=204.22 g/mol) has one acidic hydrogen. What mass of KHP was titrated (reacted completely) by the sodiu hydroxide solution? Mass= g

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### Titration of Potassium Hydrogen Phthalate (KHP)

In a titration experiment, a student titrates an unknown amount of potassium hydrogen phthalate (KHC₈H₄O₄, commonly abbreviated as KHP) with 21.93 mL of a 0.1500 M NaOH solution. The chemical formula for KHP is KHC₈H₄O₄, and it has a molar mass of 204.22 g/mol. KHP contains one acidic hydrogen atom.

The process involves determining the mass of KHP that was titrated (i.e., completely reacted) by the sodium hydroxide solution. 

The calculation to determine the mass of KHP is as follows:

\[ \text{Mass} = \_\_\_\_\_\_\_\_\_\_\_

\]

### Explanation:

When KHP is titrated with NaOH, the completion of the reaction can be used to determine the amount of KHP in grams. 

#### Notes:
- **Volume of NaOH solution used**: 21.93 mL
- **Concentration of NaOH solution**: 0.1500 M
- **Molar mass of KHP**: 204.22 g/mol

Use the relationship of moles and molar mass to find the mass of KHP:
1. Calculate the moles of NaOH used.
2. Use the stoichiometry of the reaction between NaOH and KHP to find the moles of KHP titrated.
3. Convert the moles of KHP to mass.

This procedure can be useful in various educational contexts, such as chemistry coursework involving analytical techniques and titration methods.
Transcribed Image Text: ### Titration of Potassium Hydrogen Phthalate (KHP) In a titration experiment, a student titrates an unknown amount of potassium hydrogen phthalate (KHC₈H₄O₄, commonly abbreviated as KHP) with 21.93 mL of a 0.1500 M NaOH solution. The chemical formula for KHP is KHC₈H₄O₄, and it has a molar mass of 204.22 g/mol. KHP contains one acidic hydrogen atom. The process involves determining the mass of KHP that was titrated (i.e., completely reacted) by the sodium hydroxide solution. The calculation to determine the mass of KHP is as follows: \[ \text{Mass} = \_\_\_\_\_\_\_\_\_\_\_ \] ### Explanation: When KHP is titrated with NaOH, the completion of the reaction can be used to determine the amount of KHP in grams. #### Notes: - **Volume of NaOH solution used**: 21.93 mL - **Concentration of NaOH solution**: 0.1500 M - **Molar mass of KHP**: 204.22 g/mol Use the relationship of moles and molar mass to find the mass of KHP: 1. Calculate the moles of NaOH used. 2. Use the stoichiometry of the reaction between NaOH and KHP to find the moles of KHP titrated. 3. Convert the moles of KHP to mass. This procedure can be useful in various educational contexts, such as chemistry coursework involving analytical techniques and titration methods.
**Determine the oxidation number of each element in the following:**

a. **NH₃**

- N: -3
- H: +1

b. **H₂O**

- H: +1
- O: -2
Transcribed Image Text:**Determine the oxidation number of each element in the following:** a. **NH₃** - N: -3 - H: +1 b. **H₂O** - H: +1 - O: -2
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