What concentration of sodium hydroxide is needed t...

Question

What concentration of sodium hydroxide is needed to give an aqueous solution with a pOH of 2.540? Molarity of sodium hydroxide = M

Jules Bruno · Accepted Answer

The pH and pOH of a compound determine its acidity and basicity.• pH▪ pH stands for the negative logarithmic function of hydronium ion concentration▪ can be calculated using the following equation:[readmore]pH=-log H+Take note that:         [H+] = [H3O+]• pOH▪ pOH stands for the negative logarithmic function of hydroxide concentration▪ can be calculated using the following equation:pOH=-log OH-• The relationship between pH and pOH is connected by the following equation:pH+pOH=14On the other hand, if the pH and pOH are given:• The H+ or H3O+ concentration can be calculated from pH using the following equation:H+=10-pH• The OH- concentration can be calculated from pOH using the following equation:OH-=10-pOH• The relationship between [H+] and [OH-] is connected by the following equation:Kw=H+OH-Kw = autoionization constant of waterKw = 1.0x10-14 at T = 25°CCalculate  [OH-] :OH-=10-pOH[OH-]=10-2.540     [OH-] = 2.88 x 10-3 MSince NaOH is a strong base: NaOH → Na+ + OH-then[NaOH] = [OH-]Recall that Strong bases dissociate completely in the reaction which means the [OH-] = [NaOH]The concentration of sodium hydroxide is 2.88 x10-3 M.

Problem: What concentration of sodium hydroxide is needed to give an aqueous solution with a pOH of 2.540? Molarity of sodium hydroxide = M

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Problem: What concentration of sodium hydroxide is needed to give an aqueous solution with a pOH of 2.540? Molarity of sodium hydroxide = M

FREE Expert Solution

Problem Details

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