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Acids and Bases 2 (Worksheet)

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    Name: ______________________________

    Section: _____________________________

    Student ID#:__________________________

    Work in groups on these problems. You should try to answer the questions without referring to your textbook. If you get stuck, try asking another group for help.

    1. Complete the following table for the acids and bases found in some common substances. Assume the solutions are 0.1 M at room temperature.

    Species Red Litmus Blue Litmus Solution pH Description
    HCl (stomach acid) Red Red 1.0 Strong Acid
    NaOH (drain cleaner) 10.0
    H2O (water)
    N2H4 (rocket fuel)
    Na2CO3 (baking soda) 11.0
    H2SO4 (battery acid) 2.0
    CH3COOH (vinegar) 3.4

    2. At what pH or range of pH values is a solution considered strongly acidic, mildly acidic, neutral, mildly basic, and strongly basic? Provide a brief explanation






    3. Without using a calculator, estimate the pH for each of the following [H+]:

    Molarity 0.010 1.00 x 10–3 2.5 x 10–4 7.5 x 10–4 1.000 x 10–7 2.0 x 10–9 1.0000 x 10–12
    pH


    4. Using a calculator, determine the pH for each of the following [H+]:

    Molarity 0.010 1.00 x 10–3 2.5 x 10–4 7.5 x 10–4 1.000 x 10–7 2.0 x 10–9 1.0000 x 10–12
    pH


    5. Calculate [H+], [OH–], and pOH for each of the following pH values:

    pH [H+] [OH–] pOH
    1.201
    5
    7.25
    10.3
    12.55

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