question 4 Name Lab Section Date 4. The titration curve of sodium hydroxide sod

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question 4

Name Lab Section Date 4. The titration curve of sodium hydroxide sod bydrochlorie scld is given below. Write out a alanced resction showing this process. Then, determine what unknown species are present (in majority) in the figure for A, B, and C, Use the concept of pH to belp you explain. Please provide complete sentences in your reasoning. pat Vinegar should contain more than 4% acetic acid (CHsCOOH, molar mass 60.0 g moll). 25.0 mL of vinegar are diluted to 100.0 mL and 10.0 mL samples of this solution are titrated 5. st 0 100 mol L-1 NaOH solution. An average of 18.1 mL NaOH are required to neutralize inn of the diluted solution and hence the

Explanation / Answer

4

NaOH and HCl is given

the balanced reaction

NaOH(aq) + HCl(aq) = H2O(l) + NaCl(aq)

the species given in:

a)

mostly NaOH and H2O alone, NaCl is present a little bit since some NaOH has already converted to NaCl via HCl addition

b)

this is equivalence point, by definition, there is no acid/base left, only NaCl and water

c)

this is excess acid addition so HCl is present, and H2O as well, also, NaCl has formed copmletely

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