Can not figure this out... please help ion concentration is expressed in terms o

Question

Can not figure this out... please help

ion concentration is expressed in terms of p The pOH of a solution is related to the OH ion concentration of the solution. The "p scale is used to express concentrations that are very small in magnitude. The hydrogen The formula for pOH is analogous to that for pH Part D In the simulation, open the Custom mode. The beaker will be filled to the 0 50 L mark with a neutral solution Set the pH to 4.70 by using the green arrows adjacent to the pH value indicated on the probe in the solution Once you adjust the plH, note the corresponding OH ion concentration in M as given in the graphic on the left side of the simulatio on the Loganithmic scale below the graphic n. Make sure to select the option "Concentration (mol/L) above the graphic. Select Find the pOH of the solution Express your answer numerically to two decimal places. Hints POH- Submit My Answers Give Up Continue

Explanation / Answer

We know that

pOH = -log[OH-]

pH = 4.70

[H+] = antilog (-pH) = 1.99 X 10^-5 M

[OH-] = Kw / [H+] = 10^-14 / 1.99 X 10^-5 = 5.03 X 10^-10 M

pOH = -log[OH-] = 9.3

Related Questions

Navigate

• Browse (All)
• Browse C
• Subjects

---