Data Table A. Stock solution concentrations of HCl, H 3 PO 4 and NaOH Data Table

Question

Data Table A. Stock solution concentrations of HCl, H3PO4 and NaOH

Data Table B. Temperature data for combinations of NaOH and HCl(aq)

Data Table C. Temperature data for combinations of NaOH and H3PO4

8.5

Complete the following table. (The values you enter in this table should exactly match the corresponding values you entered in Lab 1 In-lab question.)

Data Table A. Initial concentrations of HCl, H3PO4 and NaOH

1. Construct a reaction table for experiment #2, the addition of 20. mL each of HCl and NaOH and 10. mL of H2O. (All entries should be in millimoles.)

For experiment #2, which is/are the limiting reagent(s)? (Select all that apply.)

HCl

NaOH

H2O

NaCl

Explanation / Answer

                       If initial con. of both HCl and NaOH is taken to be 4.0 M   

                       HCl     +     NaOH -----------> NaCl      +     H2O

initial                 80                  80                      0                                    All in milimoles

change             80                  80                      80

Final                  0                     0                       80

The limiting reagents are HCl and NaOH

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