Chemistry, 20.04.2020 02:45 Kimbeeeerly4569

You have two beakers. One beaker contains 100 mL of NaOH (a strong base); the other contains 100 mL of aqueous Na3PO4 (a weak base). You test the pH of each solution. Which of the following statements is true ?

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Answer from: ayoismeisalex

The question lack options, that are as follows"

a. The Na3PO4 has a higher pH because it has more sodium ions than NaOH. NaOH(aq- Na3PO4(aq)b. It is possible for the solutions in each beaker to have the same pHC. If the pH of the NaOH solution is 12.00, the pH of the Na3PO4 solution has to be greater than 12.00.d. If the pH of the NaOH solution is 12.00, the pH of the Na3PO4 solution has to be less than 12.00.

The following statements are true in the given question:

d. If the pH of the NaOH solution is 12.00, the pH of the Na3PO4 solution has to be less than 12.00.

We know that:

NaOH is a strong base and Na3PO4 is a weak base. As the strength of OH- in 100ml NaOH and that of OH- in 100ml Na3PO4 is different. They have different pH values. As we know that pH is inversely proportional to H+ ion concentration. This means the higher the pH value lower is H+ ion concentration.

Again,

PH +POH =14

From the above equation,

the higher the PH value of a solution less will be its value of POH vice versa. Hence greater is the OH- ion concentration.

So,

the pH of a solution is directly proportional to OH-ion concentration.

Thus, If pH NaOH = 12.00, NaOH is a strong base and Na3PO4 is a weak base. For the solution, the weak base OH-ion concentration is less. Clearly, the pH of Na3PO4 is less than 12.00.

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Answer from: vlactawhalm29

D. If the pH of NaOH is 12, then that of Na₃PO₄ solution has to be lesser than 12.

Explanation:

In this problem, we are comparing the pH of a strong base to a weak base. A strong base is one that ionizes completely in aqueous solutions where as a weak base ionizes slightly.

The pH scale is good tool for measuring the acidity and alkalinity of various substances. It ranges from 1 - 14;

1 7 14

← →

increasing acidity increasing alkalinity

neutrality

Strong bases have their pH value close to 14 and weak bases are close to 7.

Since Na₃PO₄ is a weak base, it will have lesser pH value compared to a strong base such as NaOH

Answer from: Quest

the answer is d. 74.02

Answer from: Quest

4d^55s^1 ( third choice)

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You have two beakers. One beaker contains 100 mL of NaOH (a strong base); the other contains 100 mL...

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