List 3 scenarios for a substance being classified as a weak acid
2 answers:
Answer:
3 scenarios:
1. acetic acid, organic acid that comes from vinager
2. citric acid, that is present in some fruits
3. phosphoric acid , present in sodas
Explanation:
A weak acid is the one that partially transferres its proton (H+) to a water molecule ( partial dissociation), and usually a part of the original acid (HA) remains after the process of dissociation; that is why, a dissociation reaction of a weak acid is represented with an arrow of both ways.
As we can see, the acetic acid, citric acid and phosphoric acid are great examples of weak acid. Their pH is higher thanks to its low dissociation, and they can even be eaten in low concentrations.
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The pH of the solutions is 12.67.
<h3>What is pH of a Solution?</h3>
pH is the measurement of how acidic or basic a solution is. The range of pH values is from 0 to 14. Lower pH values mean higher acidity, while higher pH means higher basicity. If the pH value is equal to 7, then the solution is neutral.
To calculate the pH of the solution, a few approaches are possible. Here, the pOH of the solution is calculated first using the molar concentration of ions. Because pH + pOH = 14, the pH of the solution can then be calculated by subtracting pOH from 14.
Because 2 moles of ions are formed per mole of
dissolved, the pOH of a saturated
solution at
is,
Concentration () of
ions,
= 0.02335 mol
/L X 2 mol
/1 mol
= 0.0467 mol
/L
*pOH of saturated solution,
pOH = -log []
pOH = -log [0.0467 mol /L ]
pOH = 1.33
*pH of saturated solution,
pH = 14 - 1.33
pH = 12.67
Hence, the pH of the solutions is 12.67.
Learn more about pH of the solutions here:
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