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Laboratory Worksheet Molar concentration of NaOH solution (from last week) 0.0997 Unknown acid ID number Acid identity (ask your instructor) Trial I Trial 3 volume of acid (ml.) 10.00 10.00 10.00 final buret reading (ml) 26.55 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 HCT? Show your calculation of average molarity for the three trials. Include units, and follow the significant figures convention Record your average molarity here Determining the Concentration of an Unknown Acid: 2 moli HCL
Determining the Conceiration of an Unknown Acid Post-lab Assignment 1. Calculate the molarity of a barium hydroxide solution if you d 41 65 mL of it to neutralize. 1.190 g of potassium bydgen patate Ba(OH) 2 KHCHOCO KClOng+20) 2. Write a balanced chemical equation for the reaction of hydrochloric acid with sodium hydroxide 3. Calculate the molarity of a hydrochlonc acid solution if 34.21 ml. of 0.0431M sodium hydroxide neutralizes 25.00 ml of the acid solution. Hint find moles of NaOtt using volume and molarity. Convert it to molarity. moles NaOH to moles HCL then use volume to c 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 0.0431Af sodium hydroxide neutralizes 25.00 ml of the acid solution Determining the Concentration of an Unknown Acid