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ID: 987947 • Letter: H

Question

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Question

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.)

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

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

HCl(aq) + NaOH(aq) NaCl(aq) + H2O initial ? ? 0 ---------- change () ? ? ? ---------- final ? ? ? ----------

Explanation / Answer

Reaction table for experiment #2

Expt #

mL NaOH

mmol NaOH

ml H2O

mL HCl

mmol HCl

Initial T,
to the 0.01  °C

Final T,
to the 0.01  °C

T, °C

1

20.

30

20.

10.

15

25

29

4

2

20.

30

10.

20.

30

24.5

32

7.5

3

20.

30

0

30.

45

24.5

32

7.5

HCl(aq)

+ NaOH(aq)

NaCl(aq)

+ H2O

initial

30

30

0

----------

change ()

-30

-30

30

----------

final

0

0

30

----------

Expt #

mL NaOH

mmol NaOH

ml H2O

mL HCl

mmol HCl

Initial T,
to the 0.01  °C

Final T,
to the 0.01  °C

T, °C

1

20.

30

20.

10.

15

25

29

4

2

20.

30

10.

20.

30

24.5

32

7.5

3

20.

30

0

30.

45

24.5

32

7.5