Is Khp an acid or base?

Asked By: Jerilyn Mante | Last Updated: 27th June, 2020
Category: science chemistry
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It forms white powder, colorless crystals, a colorless solution, and an ionic solid that is the monopotassium salt of phthalic acid. KHP is slightly acidic, and it is often used as a primary standard for acid-base titrations because it is solid and air-stable, making it easy to weigh accurately. It is not hygroscopic.

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In this regard, is Khp a strong or weak acid?

KHP is a weak organic acid, Sodium Hydroxide is a strong base. When combined, an acid-base neutralization reaction takes place generating a conjugate salt and water as reaction products.

Likewise, why is Khp a good primary standard? The potassium hydrogen phthalate (KHP) is a suitable primary standard because it is stable as a solid and in solution, it is soluble in water, it is not hygroscopic, it is easily dried and its molecular mass (approximately 200 g mol-1) results in convenient and accurately determined masses of the substance for making

Accordingly, what is KHP titration?

A commonly used primary standard for titration with sodium hydroxide solution is the weak acid potassium hydrogen phthalate or KHP (C8H5O4K). The molarity of the KHP solution is determined from the mass and volume of KHP used to prepare the KHP solution.

What is the structure of Khp?

C8H5KO4

39 Related Question Answers Found

Is NaOH an acid or base?

NaOH is a base because when dissolved in water it dissociates into Na+ and OH- ions. It is the OH- (hydroxyl ion) which makes NaOH a base. In classical term a base is defined as a compound which reacts with an acid to form salt and water as depicted by the following equation.

Is HCl a strong acid?

A strong acid is an acid which is completely ionized in an aqueous solution. Hydrogen chloride (HCl) ionizes completely into hydrogen ions and chloride ions in water. Because HCl is a strong acid, its conjugate base (Cl) is extremely weak.

Is NaOH a strong base?

Sodium hydroxide (NaOH) is strong base because it fully dissociates in water to produce hydroxide ions. While ammonia (NH3) is weak base because it accepts protons from water to produce fewer hydroxide ions in solution. While weak bases produce fewer hydroxide ions, making the solution less basic.

Is Na2CO3 an acid or base?

Na2CO3 is neither an acid nor a base. It is a salt. A salt in chemistry is formed by the reaction of an acid and a base.

Why is standardizing NaOH important?


First of all, solid NaOH absorbs water from the air, so accurately weighing a sample during the preparation of a solution is impossible. Once the NaOH solution has been standardized and its concentration is well-known, it can be used to titrate other acid solutions such as HCl.

Is khc8h4o4 a strong acid?

Potassium hydrogen phthalate, often called simply KHP, is an acidic salt compound. It forms white powder, colorless crystals, a colorless solution, and an ionic solid that is the monopotassium salt of phthalic acid.

What is Khp NaOH?

The reaction between an acid and base produces a salt and water, something that you may have heard before. In the reaction that you will be investigating, the acid is potassium hydrogen phthalate (KHP), and the base sodium hydroxide (NaOH). NaOH(aq) + KHC8H4O4(aq) = KNaC8H4O4(aq) + H2O(l)

What is the phenolphthalein indicator?

Phenolphthalein is often used as an indicator in acid–base titrations. For this application, it turns colorless in acidic solutions and pink in basic solutions. Phenolphthalein is slightly soluble in water and usually is dissolved in alcohols for use in experiments.

Why do we use NaOH in titration?

It is a strong alkaline reagent and produces a sharp change in pH which makes titration easier to do.

How do you standardize acids and bases?


To standardize a base solution such as NaOH, an acid whose amount can be determined to a high degree of accuracy (called a primary standard) is needed. Potassium hydrogen phthalate (KHP), a monoprotic acid, is often used as a primary standard for titrating bases. KHP can be dried in an oven to remove traces of water.

What is the molarity of NaOH?

For example, a 0.25 M NaOH solution (this is read as 0.25 molar) contains 0.25 moles of sodium hydroxide in every liter of solution. Anytime you see the abbreviation M you should immediately think of it as mol/L.

What is Standardisation in titration?

Standardization is the process of determining the exact concentration (molarity) of a solution. Titration is one type of analytical procedure often used in standardization. In a titration, an exact volume of one substance is reacted with a known amount of another substance.

Why NaOH is not a primary standard?

a) absorb moisture from the air. N a O H NaOH NaOH is not suitable for use as a primary standard because they readily absorb moisture, H 2 O H_2O H2O, from the atmosphere. They readily absorb carbon dioxide from the atmosphere.

How do you calculate titration?

Use the titration formula. If the titrant and analyte have a 1:1 mole ratio, the formula is molarity (M) of the acid x volume (V) of the acid = molarity (M) of the base x volume (V) of the base. (Molarity is the concentration of a solution expressed as the number of moles of solute per litre of solution.)

How do you determine concentration?


The standard formula is C = m/V, where C is the concentration, m is the mass of the solute dissolved, and V is the total volume of the solution. If you have a small concentration, find the answer in parts per million (ppm) to make it easier to follow.

Why do we standardize solutions?

Why do we Standardize a Solution? Sometimes we should have to standardize Solutions (Reagents) before starting a chemical experiments because,it will allow us to get correct readings during the experiment whereas the exact concentration of the solution could be different.

How do you standardize NaOH?

To standardize NaOH, start by pipetting 10.0 ml of 0.1 N hydrochloric acid (HC1) into a flask. Add approximately 50 ml of water (remember, not tap water) and three drops of methyl red indicator. Fill a 25 ml buret with the 0.1 N sodium hydroxide solution and record the initial volume.