Questions Experiment 13 Name Lab Acid Base titration 1. If the titration of 25.0

Question

Questions Experiment 13 Name Lab Acid Base titration 1. If the titration of 25.0mL sample of hydrochloric acid requires 22.15 mL of 0.155 NM sodium hydroxide, what is the molarity of the acid? HCI(aq) + NaOH(aq) H2O(l) + NaCl(aq) 2. Ir the titration of a 25.0 mL sample of calcium hydroxide requires 34.45 mL of 0.100 M perchloric acid, what is the molarity of the base? 2HCIOdaq) + Ca(OH)2(aq) Ca(CI04)2(aq) + 2H20(1) Acid Base standardization 3. What is the molarity of nitric acid if 41.25 mL of HNOs is required to neutralize 0.689 g of sodium carbonate? 2HNOs(aq) + Natco taq) NaNodaq) + H2O(l) + CO2(g) What is the molarity of sulfuric acid if 32.35 mL of H2S04 is required to neutralize 0.750 g of sodium hydrogen carbonate? 4. lisodaq) + 2NaHC)(aq) Na2SOdaq) + 2H2O(l) + 2 CO2(aq) AFTER THE LAB (you will need your data to answer this question) A pickle juice maker is asked to make 5000 jars of pickles. Assuming each jar contains 450 mL of brine (pickle juice). How many L of vinegar would be required to make the brine for these pickles? 5.

Explanation / Answer

Ans 1 :

Since the reaction utilises equimolar concentrations of both the reactants , we can use the formula , M1 V1 = M2 V2

where M is molarity and V is volume of the solution.

SO putting all the values we get :

M x 25.0 = 0.155 x 22.15

M = 0.137 M

So the molarity of the acid is 0.137 M

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