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To clean a clogged drain, 26 g of sodium hydroxide is added to water to make 150 mL of solution. What are the pH and pOH values...Asked by Finn
To clean a cloged drain, 26g of sodium hydroxide is added to water to make 150mL of solution. What are the pH and pOH values for the solution?
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Answered by
DrBob222
mols NaOH = grams/molar mass = 26/40 = 0.65
Molarity = mols/L = 0.65/0,150 == 4.33 M so (OH^-) = 4.33 M
pOH = - log (OH^-) = -log 4.33 = - 0,63. Yes, that's a minus 0.63 because the OH is > 1.0 M. The pOH is 0 if OH is 1.0 M
pH + pOH = pKw = pKw = 14. You know pKw and pOH, solve for pH
Molarity = mols/L = 0.65/0,150 == 4.33 M so (OH^-) = 4.33 M
pOH = - log (OH^-) = -log 4.33 = - 0,63. Yes, that's a minus 0.63 because the OH is > 1.0 M. The pOH is 0 if OH is 1.0 M
pH + pOH = pKw = pKw = 14. You know pKw and pOH, solve for pH