Laboratory Worksheet Molar Concentration Of Naoh Solution From Last Week 0 0997 Unknown Acid Id Number 27 Acid Identi 1 (40.26 KiB) Viewed 47 times
Laboratory Worksheet Molar Concentration Of Naoh Solution From Last Week 0 0997 Unknown Acid Id Number 27 Acid Identi 2 (34.21 KiB) Viewed 47 times
Laboratory Worksheet Molar concentration of NaOH solution (from last week). 0.0997 Unknown acid ID number 27 Acid identity (ask your instructor) Trial I Trial 2 Trial 3 volume of acid (mL) 10.00 10.00 10.00 final buret reading (ml) 23.65 20.55 23.80 initial buret reading (mL) 5.80 2.65 5.75 volume delivered (ml) molarity (mol/L) Write the chemical equation for the neutralization of your specific unknown acid by NaOH (aq). Show your molarity calculation for Trial 1. Include units, and follow the significant figures convention. How many moles of NaOH did you add? How many moles of HCI will react with this many moles of NaOH? What else do you need to know to calculate the molarity of HCI? Show your calculation of average molarity for the three trials. Include units, and follow the significant figures convention. Record your average molarity here M Determining the Concentration of an Unknown Acid: 2 mol/L HCI
Determining the Concentration of an Unknown Acid Post-lab Assignment 1. Calculate the molarity of a barium hydroxide solution if you used 41.65 ml of it to neutralize 1.190 g of potassium hydrogen phthalate. Ba(OH)2(aq) + 2 KHCH.Oafaq) BaCsHeOafaq) + K:CsH.Os(aq) + 2 H₂O(l) 2. Write a balanced chemical equation for the reaction of hydrochloric acid with sodium hydroxide. 3. Calculate the molarity of a hydrochloric acid solution if 34.21 mL of 0.0431M sodium hydroxide neutralizes 25.00 mL of the acid solution. Hint: find moles of NaOH using volume and molarity. Convert moles NaOH to moles HC1, then use volume to convert to molarity. 4. Write a balanced chemical equation for the reaction of phosphoric acid with sodium hydroxide. 5. Calculate the molarity of a phosphoric acid solution if 34.21 mL of 0.0431M sodium hydroxide neutralizes 25.00 mL of the acid solution. Determining the Concentration of an Unknown Acid: 3
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