Question

1. your screen.  This part of simulation lets you change the pH of the solution to see how [H⁺] and [OH^-] change.   Adjust the pH to the following and record the corresponding [H⁺] and [OH^-].  For the second to last column, multiply [H⁺] and [OH^-] together.

2. pH	[H+]	[OH-]	[H+] x [OH-]	Acidic? Basic? Neutral?
   1.00
   4.00
   7.00
   10.00
   13.00

3. Now use the simulation to fill in the table below and answer the questions.  For the second to last column, multiply [H⁺] and [OH^-] together.

pH	[H+]	[OH-]	[H+] x [OH-]	Acidic, Basic, or Neutral
2.99
4.95
8.05
10.23

1. Is the relationship between [H⁺] and pH still the same as the previous table?

2. Is the product of [H⁺] and [OH^-] still the same as the previous table?

3. How does this table and the previous one differ?

Part B: The Power of Hydrogen – Read carefully

The term pH stands for the power (as in exponent) of hydrogen. Exponential functions in math are related to logarithmic functions.   Therefore, the relationship between [H+] and pH is a logarithmic function mathematically speaking.

If you are given [H⁺], you can calculate pH using:  pH = - log₁₀[H⁺]   (note the negative sign)

Example:

If you were give the [H⁺] = 1.0 x 10^-2 M, the pH would the negative of that exponent which would be “2”.   

But the [H⁺] isn’t always so perfect that you wouldn’t need a calculator.   Locate the log function on your calculator and try the following.

• Determine the pH of a solution whose [H⁺] is 5.00 x 10^-12 M.  Show your work.

• Use the simulation to check your answer by dragging the [H+] slider to this concentration and seeing what the pH is.

If you are given pH, you can calculate [H⁺] using:   [H⁺]  = 10^-pH      (note the negative sign)

Example:  If you were give the pH of 3.00. The [H⁺] would be 10^-3 which we would write as 1 x 10^-3 M.

But pH is not always a nice number like that you wouldn’t ever need a calculator. Locate the 10^x button on your calculator and try the following.

• Determine the [H⁺] concentration of a solution with a pH of 3.45.  You must write this answer in proper scientific notation where the exponent is a whole number.

• Use the simulation to check your answer by setting the pH and then noting the [H⁺]

Answer 1

Tablea! PHIPOH = 14. Cor] =10 Pony na ang PH => -109CH), [ht] = 10PH Subject PH al con (H) x acldic trasic ON Inleutral 10²x lots (Let on - Acidic 11 => Pon=13 102.1M 10 M => 1514 4 Pol=10 10 tu lolm 104 loto (h+] con » Acidici 1014 7 Pon=7 10-7 lotu 10tx 107 => 1014 (4+] = Con Neutral 10 -10 10M 164M 107x107 [ht Koh BASIC Pon=4 = 1014 16-1 10 M 163410 113 Phal CH+] con] Basic 1014 Table Neutral =10 PH Chet row Cretx Con Acidec Basha 2.99 00102 9.803x10 00102x +2 9.803x10 74 Pont 11-01 Cut] 7 on Acidic 4.95 .1122x10 m 8.01x10m 1 1 22 x10 + Pon 29.05 x 8.91x10 -10lt Cut]> Точ 8.05 • &gIXIO 1. 12x106 Thul on Basic 1.7x10TM •588x10M Please uprote and ask if Hacidic 1044 Pons.gr 10.23 Pon=3.77 [H] Low Basic Any doubts ruh have your writing partner