27 Jun Write the fresh new conjugate acids for the next Bronsted bases: NH

Question 19. The species H_dosO, HCO_{step three} – , HSO_cuatro – and NH₃ can act both as Bronsted acid and base. For each case, give the corresponding conjugate acid and base. Answer:

Question 20. (a) OH – ions (b) F – (c) H + (d) BCI₃ Answer: (a) OH – ions can donate an electron pair and act as Lewis base. (b) F – ions can donate an electron pair and act as Lewis base. (a) H + ions can accept an electron pair and act as Lewis base. (b) BCl₃ can accept an electron pair since Boron atom is electron deficient. It is a Lewis acid.

Question 21. Predict the acidic, basic or neutral nature of the solutions of the following salts: NaCI, KBr, NaCN, NH₄NO₃, NaNO₂, KF. Answer: NaCN, NaNO₂, KF solutions are basic, as they are salts of strong base, weak acid. NaCl, KBr solutions are neutral, as they are salts, of strong acid, strong base. NH₄NO₃ solution is acidic, as it is a salt of strong acid, weak base.

Matter twenty-two. Ionic unit out-of liquid in the 310 K is actually dos.eight x 10 -14 What is the pH out of simple liquids at that temperature? Answer:

Question 23. This new aqueous provider of sugar does not conduct electricity while when salt chloride is actually added to liquid, it performs energy. Validate it report. Answer: step 1. Glucose was a non electrolyte and when they dissolves in the water, there will be no ionisation happen. If you have zero totally free ions, it doesn’t make energy.

O is actually acid

2. Whenever sodium chloride are put in liquids, it’s entirely ionised to provide Na ions and you may Cl – ions. Because of the visibility from ions, they will be probability of electhcal conductance. Given that ions is actually carriers off household current.

step three. An excellent Lewis acidic are a keen electron lacking molecule and you can effective at taking a couple of electrons and you will good Lewis feet is actually electron rich molecule and you can ready donating a set of electrons.

Concern twenty-five. The brand new sodium away from solid acidic and you will strong base will not go through hydrolysis. Identify. Answer: step one. In cases like this, neither the brand new cations nor new anions undergo hydrolysis. Together with solution remains natural.

dos. Such, from the aqueous solution out of NaCl, their ions Na + and you will Cl – ions have no tendency to function that have H + or OH – ions away from drinking water.

This is because the fresh new possible issues of such reaction was NaOH and you may HCI which happen to be entirely dissociated. Because of this, there is no change in the concentration of W and you will OH – ions thus the clear answer will continue to are natural.

Question step 1. Define Lowry – Bronsted concept from acidic and you may feet. Answer: step 1. According to Lowry-Bronsted concept, an acid means a substance who may have a propensity in order to give good proton to a different compound and you will legs try a good substance who’s a tendency to accept an effective proton from other compound.

3. When HCI is dissolved in H₂O, HCI donates a proton to H₂O. Thus HCI behaves as an acid and H₂O is a base. HCI + H₂O \(\rightleftharpoons\) H₃O + + Cl –

Question 2. Explain the reaction of water with ammonia by proton theory. Answer: 1. When ammonia dissolved in water, it accepts a proton from water. In this case, ammonia (NH₃) acts as a base and H₂

Categorize the next kinds into the Lewis acids and Lewis angles and you can show just how these may play the role of Lewis acid I Lewis feet?

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3. The species that remains after the donation of a proton is a base (Base₁) and is called the conjugate base of Bronsted acid (Acid₁). In other words, chemical species that differ only by a proton are called conjugate acid base pairs Conjugate acid – base pair