Why is phosphoric acid a Triprotic acid?
Table of Contents
- 1 Why is phosphoric acid a Triprotic acid?
- 2 What does it mean to be a Triprotic acid?
- 3 What is the Ka of phosphoric acid?
- 4 What is the formula of phosphoric acid?
- 5 Which of the following is Triprotic acid?
- 6 Why does phosphoric acid have two equivalence points?
- 7 What are some examples of diprotic acids and triprotic acids?
- 8 What is the dissociation constant of phosphoric acid?
Why is phosphoric acid a Triprotic acid?
Phosphoric acid is a triprotic acid. When dissolved in water, it first gives up one proton and dissociates to dihydrogen phosphate, i.e. it reacts like a monoprotic acid (see formula 1). The third protolysis requires a considerably higher pH value (see formula 3).
What does it mean to be a Triprotic acid?
A triprotic acid is an acid that has three dissociable protons that undergo stepwise ionization: Phosphoric acid is a typical example: The first ionization is.
What type of acid is phosphoric acid Triprotic?
Polyprotic Acids
Introduction
| Common Polyprotic Acids | Formula | Number of Ionizable Hydrogens |
|---|---|---|
| Phosphoric acid | H3PO4 | 3 (triprotic) |
| Carbonic acid | H2CO3 | 2 (diprotic) |
| Hydrosulfuric acid or Hydrogen sulfide | H2S | 2 (diprotic) |
| Oxalic acid | H2C2O4 | 2 (diprotic) |
Is phosphoric acid a weak Triprotic acid?
H3PO4 is a weak triprotic acid.
What is the Ka of phosphoric acid?
| Ka | Acid | |
|---|---|---|
| 1.0 * 10-2 | Hydrogen sulfate ion | HSO4 – |
| 7.1 * 10-3 | Phosphoric acid | H3PO4 |
| 7.2 * 10-4 | Nitrous acid | HNO2 |
| 6.6 * 10-4 | Hydrofluoric acid | HF |
What is the formula of phosphoric acid?
H3PO4
Phosphoric acid/Formula
What is the formula for phosphoric acid?
Why is citric acid a Triprotic acid?
Another example of a triprotic acid is citric acid, which can successively lose three protons to finally form the citrate ion.
Which of the following is Triprotic acid?
Two common examples are carbonic acid (H2CO3, which has two acidic protons and is therefore a diprotic acid) and phosphoric acid (H3PO4, which has three acidic protons and is therefore a triprotic acid).
Why does phosphoric acid have two equivalence points?
Diprotic and polyprotic acids show unique profiles in titration experiments, where a pH versus titrant volume curve clearly shows two equivalence points for the acid; this is because the two ionizing hydrogens do not dissociate from the acid at the same time.
What is the Ka of carbonic acid?
| Ka | Acid | Base |
|---|---|---|
| 5.4 * 10-5 | Hydrogen oxalate ion | O2C2O2 2- |
| 1.8 * 10-5 | Ethanoic acid | CH3COO |
| 4.4 * 10-7 | Carbonic acid | HCO3 – |
| 1.1 * 10-7 | Hydrosulfuric acid | HS- |
Is phosphoric acid an oxidizing agent?
Phosphorus acid can act both as oxidising agent as well as reducing agent while phosphoric acid is only an oxidising agent. The behaviour is linked with the oxidation state of phosphorus atom in the two acids. In phosphorus acid (H3PO3), the oxidation state of P is + 3.
What are some examples of diprotic acids and triprotic acids?
Diprotic acids , such as sulfuric acid (H 2 SO 4 ), carbonic acid (H 2 CO 3 ), hydrogen sulfide (H 2 S), chromic acid (H 2 CrO 4 ), and oxalic acid (H 2 C 2 O 4) have two acidic hydrogen atoms. Triprotic acids, such as phosphoric acid (H 3 PO 4) and citric acid (C 6 H 8 O 7 ), have three. There is usually a large difference in
What is the dissociation constant of phosphoric acid?
Phosphoric acid is a triprotic acid. It’s dissociation constants (Ka) are very small. For example the first dissociation constant Ka1 value is 0.007. Second dissociation constant Ka2 is 0.000000062 and third dissociation constant Ka3 is 0.00000000000048.
Why is phosphoric acid weaker than nitric acid?
Putting valid numbers with maintaining the same concentration (denominator) as weak acid. pH of phosphoric acid (1.07) > pH of nitric acid (0.7). Lower the pH stronger the acid. Hence phosphoric acid is weaker than nitric acid. This is a just an example based on the dissociation constants. There is no alternative to read the text book.
Which of the following acids has two acidic hydrogen atoms?
Diprotic acids , such as sulfuric acid (H 2 SO 4 ), carbonic acid (H 2 CO 3 ), hydrogen sulfide (H 2 S), chromic acid (H 2 CrO 4 ), and oxalic acid (H 2 C 2 O 4) have two acidic hydrogen atoms. Triprotic acids, such as phosphoric acid (H 3 PO 4) and citric acid (C 6 H 8 O 7 ), have three.