PH of 50.0g Na3PO4 in 1L Very Basic

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In summary, to find the pH of a solution containing 50.0g of (Na_3)(PO_4) in a liter of solution, you will need to use the equilibrium constants. First, convert the mass of the compound to moles and then use the molar ratios to find the moles of the anion. Since the compound is a strong base, the concentration of OH- ions will be the same as the concentration of (Na_3)(PO_4). Use the Kb equation to solve for the hydroxide concentration and then use the equation pH = 14 + log[OH-] to calculate the pH. It is important to consider the potential use of the second Kb to determine the margin of
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What is the pH of a solution containing 50.0g of (Na_3)(PO_4) in a liter of solution? We are given that (Na_3)(PO_4) is very basic.
 
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pH = 14 + log[OH]
as it is a strong base, the concentration of OH- ions should be the same as the concentration of (Na_3)(PO_4). Can you work it out from there?
 
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What is the pH of a solution containing 50.0g of (Na_3)(PO_4) in a liter of solution? We are given that (Na_3)(PO_4) is very basic.
You'll need to use the equilibrium constants, that's probably what your teacher/professor wants. I'll give you a general outline, although in most cases it's not the best way to learn the problem...

convert from grams of the compound to moles compound, and using the molar ratios, convert to moles of the anion.

The anion has three Kbs, in most cases however, you can ascribe the pH to the first Kb (or is it the "third" Kb). The rest is pretty simple, use the Kb equation
[tex]
K_{b} = \frac{[HPO_{4}^{2-}][OH^{-}]}{[PO_{4}^{3-}]}[/tex]

solve for the hydroxide concentration and then use the equation phiJ recommended to solve for pH.

After solving for the OH- concentration try to determine whether the usage of the second Kb was necessary for a magnitude of error.
 

Related to PH of 50.0g Na3PO4 in 1L Very Basic

1. What is the pH of a solution containing 50.0g Na3PO4 in 1L of water?

The pH of this solution would depend on the concentration of Na3PO4 and the equilibrium it forms in water. However, in general, the presence of a strong base like Na3PO4 would make the solution very basic, with a pH above 7.

2. How do you calculate the pH of a solution with a known amount of Na3PO4?

To calculate the pH of a solution with a known amount of Na3PO4, you would need to determine the concentration of the solution, then use the concentration to calculate the concentration of the hydroxide ions present. From there, you can use the concentration of hydroxide ions to determine the pH using the equation pH = -log[OH-].

3. Can the pH of a solution containing Na3PO4 change over time?

Yes, the pH of a solution containing Na3PO4 can change over time due to various factors such as the addition of other substances, changes in temperature, or the formation of new chemical equilibria.

4. How does the pH of a solution with Na3PO4 differ from a solution with NaOH?

The pH of a solution with Na3PO4 and a solution with NaOH can differ because they have different concentrations and form different equilibrium systems. Additionally, Na3PO4 is a weaker base compared to NaOH, so a solution with Na3PO4 would have a higher pH compared to a solution with the same molar concentration of NaOH.

5. Can the pH of a solution with Na3PO4 be adjusted?

Yes, the pH of a solution with Na3PO4 can be adjusted by adding an acid or base to the solution. This would change the concentration of the hydroxide ions and therefore affect the pH of the solution.

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