Sodium Hydroxide Reacts With Ascorbic Acid To Produce Sodium Ascorbate And Water. Below Is The Chemical Equation:
Sodium hydroxide reacts with ascorbic acid to produce sodium ascorbate and water. Below is the chemical equation: 2NaOH(aq) + H₂CH₂O (aq) Na₂CH₂O(aq) + 2H2O(l) Part A Standardization of the NaOH Solution Trial 1 0.4 Trial 2 Trial 3 Mass of Ascorbic Acid (g) Moles Ascorbic Acid Moles NaOH tased on stoichiometry NaOH Initial Volume (V) NaOH final Volume (V) 22.5 mL ml. -ml. ml -ml L M M M NaOH Volume Used VV NaOH Molarity 0.00 ml
The Correct Answer and Explanation is :
Let’s break down the information and provide an explanation on how to calculate the molarity of NaOH from the standardization process using ascorbic acid.
Given:
- The reaction equation:
2NaOH (aq)+C6H8O6(aq)→Na2C6H6O6(aq)+2H2O (l)2 \text{NaOH (aq)} + \text{C}_6\text{H}_8\text{O}_6 \text{(aq)} \to \text{Na}_2\text{C}_6\text{H}_6\text{O}_6 \text{(aq)} + 2 \text{H}_2\text{O (l)} - In this equation, 2 moles of NaOH react with 1 mole of ascorbic acid (C₆H₈O₆) to form sodium ascorbate and water.
Now, from your provided data, it seems that you have mass data and volume data for NaOH and ascorbic acid, but you have placeholders (e.g., “0.4,” “22.5 mL,” and others) that need to be clarified.
Step-by-Step Process:
- Calculate Moles of Ascorbic Acid: To calculate the moles of ascorbic acid (C₆H₈O₆), we use its molar mass. The molar mass of ascorbic acid is approximately 176.12 g/mol. If we know the mass of ascorbic acid used, the moles of ascorbic acid can be calculated by: Moles of Ascorbic Acid=Mass of Ascorbic Acid (g)Molar Mass of Ascorbic Acid (g/mol)\text{Moles of Ascorbic Acid} = \frac{\text{Mass of Ascorbic Acid (g)}}{\text{Molar Mass of Ascorbic Acid (g/mol)}}
- Moles of NaOH: From the stoichiometry of the reaction, 2 moles of NaOH are required to react with 1 mole of ascorbic acid. So, the moles of NaOH required will be twice the moles of ascorbic acid used. This can be calculated as: Moles of NaOH=2×Moles of Ascorbic Acid\text{Moles of NaOH} = 2 \times \text{Moles of Ascorbic Acid}
- NaOH Volume Used: To determine the volume of NaOH used in the titration, you can subtract the initial volume of NaOH from the final volume, i.e.: Volume of NaOH used=Final Volume−Initial Volume\text{Volume of NaOH used} = \text{Final Volume} – \text{Initial Volume} Ensure the volume is in liters, as molarity is expressed in moles per liter.
- Calculate Molarity of NaOH: Molarity is defined as moles per liter (mol/L). So, the molarity of NaOH can be calculated by: M=Moles of NaOHVolume of NaOH used (L)M = \frac{\text{Moles of NaOH}}{\text{Volume of NaOH used (L)}}
Once you have the volume of NaOH used and the number of moles of NaOH required, you can calculate the molarity of NaOH. This method of standardization allows you to determine the concentration of NaOH based on the known concentration of ascorbic acid.
Conclusion:
To find the molarity of NaOH, you need the specific mass of ascorbic acid and the precise volume measurements for NaOH. Using stoichiometry and the relationship between NaOH and ascorbic acid (2:1), you can calculate the molarity of NaOH. The process involves determining the number of moles of ascorbic acid, using stoichiometry to find the moles of NaOH, and then using the volume of NaOH to calculate its molarity.