pH, the meaning of the pH scale, acids and bases and buffer solutions
We did an experiment in lab on pH,acids and bases but he really didn't go over it w/ us and wants us to answer the self test questions on our lab manual.
Kindly help me answer the ff questions:
1) The pH scale is a logarithmic scale. This means that the difference between 2 pH units is really a factor of 10. With this in mind, answer the following questions:
* i really couldn't understand what it means when they say, "this means that the difference between 2 pH units is really a factor of 10"
a. how many times more acidic is a solution whose pH =1 compared to a solution whose pH is 5?
b. how many times more basic is a solution whose pH=12 compared to a solution whose pH = 10?
2) Write a list showing the advantages and disadvantages of obtaining the pH of a substance using
a. a pH meter
b. pH paper (or universal indicator)
-- maybe you can give me more reasons *wink*
3. Complete the ff equations for the addition of an acid and base to phosphate buffer solution.
a. (HPO4)-2 + H1+ -->
b. (H2PO4)-1 + (OH)1- -->
thanks so much!!! i would really appreciate it!
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