Data Sheet: Activity 7 – Acids and Bases
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Activity Data
... [Show More] Code: MCQ
Table I – Raw Reaction Data
Pick four different base solution volumes for your data runs. Note that base volume settings run from 12.00 mL to 16.00 mL (in 0.20 mL increments). Acid Volume at pH = 7.00 can be found on your pH Plots after a data run (see pH Plots tab).
Observations and Questions
[1] What was your initial (pre-reaction) pH of each base solution? Does the volume of base solution affect this initial pH? Why?
[2] Pick one of your reactions above and describe how pH changes as the acid solution is added to the base solution. Why does the pH plot have the shape it does?
[3] Describe and explain the differences between your different reaction pH plots.
Table II – Moles of Base
Complete the table below using data found under the Activity-Form tab and information found under the Background tab (see the Summary of Needed Formulas section at the very end).
Note: Be very careful with units! Volume must be in liter (L) not milliliter (mL) for moles of base calculation. Example: 1000 mL = 1.000 L, so 15.00 mL = 0.01500 L
Sample Calculation: Show your moles of base calculation for HCl (reaction 1).
Table III – Concentration of Acid Solutions
Complete the table below using information found under the Background tab (see the Summary of Needed Formulas section at the very end).
Hint: Remember that the reaction is complete (pH = 7.00) when moles of acid = moles of base.
Note: Be very careful with units! Volume must be in liter (L) not milliliter (mL) for the concentration calculation. Example: 1000 mL = 1.000 L, so 15.00 mL = 0.01500 L
Sample Calculation: Show your acid solution concentration calculation for HCl (reaction 1).
Sample Calculation: Show your acid solution concentration calculation for HNO3 (reaction 1).
Table IV – pH of Acid Solutions
Complete the table below using your results from Table III (Acid Concentration in mol/L) and information found under the Background tab (see the Summary of Needed Formulas section at the very end for the pH formula).
Hint: in a strong acid solution the hydronium ion concentration is equal to the acid concentration.
Sample Calculation: Show your acid solution pH calculation for HCl (reaction 1).
Sample Calculation: Show your acid solution pH calculation for HNO3 (reaction 1). [Show Less]