Hey, having trouble with this basic gen Chem lab. Please help! Acids, Bases, Sal

Question

Hey, having trouble with this basic gen Chem lab. Please help! Acids, Bases, Salts, and Indicatoes Prelab Name Look up the indicators listed below and find two others or your choice to include Fill in their colors and the pll range over which a change occurs. Prelab 1· pH range/s where transition's occuris Indicator Coloris in acid and base Methyl orange Phenolphthalein Phenol red Bromocresol parple Thymol blue Bromothymol bluc IfpH-3 then [H'] = 0.001-10, and I fpH-2 then [H.] = 0.01 = 103 and so on. Complete the statement: As the pH value The statement is-log [H']-pH or--og (10-) Note that strong acid [H'] is the same as the strong acid concentration. 0.1 M HCI has [H']- 0.1 M 2. the [H.] [Increases or decreases] , 3. 5-5. Write the equivalent statement for [H']-10" . 4. What is the [OH'] for pH 5? 5. What is the [OH] for pH -9? ventures in General Chemistry Il:Exercises and Experiments, Liberty University Fall 2017 Page 81

Explanation / Answer

pH= -log [H+], [H+]= 10(-pH), so as the pH increased, [H+] decreases.

2. [H+]= 10-9, pH= -log (10-9)= 9

3. pH+ POH= 14, pH= 5, pOH= 14-5= 9, [OH-]= 10-9=

4.pH=9, pOH= 14-9=5, [OH-] =10-5,

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