Question 19. The species H_dosO, HCO₃ – , HSO₄ – 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.

Question 22. Ionic unit out-of water on 310 K is actually dos.eight x ten -fourteen What’s the pH out-of simple liquid at this temperature? Answer:

Concern 23. New aqueous provider away from glucose does not make stamina whereas whenever salt chloride was set in water, they performs power. Validate which report. Answer: 1. Glucose are a non electrolyte incase they dissolves in water, there won’t be any ionisation takes place. If there is no totally free ions, it will not perform energy.

O is acidic

dos. When sodium chloride are put into liquid, it’s entirely ionised to offer Na ions and Cl – ions. Because of the exposure out of ions, they shall be possibility of electhcal conductance. As the ions is carriers regarding electric current.

step three. A beneficial Lewis acid is actually a keen electron lacking molecule and you will ready recognizing a set of electrons and you may a good Lewis legs are electron rich molecule and you may with the capacity of donating a couple of electrons.

Question 25. The new salt out-of good acid and good feet doesn’t read hydrolysis. Define. Answer: step 1. In this situation, none the fresh new cations nor the fresh anions read hydrolysis. As well as the services stays natural.

dos. For example, on the aqueous service away from NaCl, the ions Na + and you will Cl – ions have no tendency to function having H + otherwise OH – ions away from liquids.

This is because new you’ll circumstances of these impulse try NaOH and HCI which happen to be completely dissociated. As a result, there is no change in the fresh concentration of W and you may OH – ions and therefore the solution will continue to will still be neutral.

Matter step one. Explain Lowry – Bronsted principle off acid and you can ft. Answer: step one. Considering Lowry-Bronsted concept, an acidic means a substance who’s got a propensity to help you give good proton to some other live escort reviews Inglewood substance and you may ft was an excellent substance who has a propensity to accept a good proton from other substance.

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

Identify the second varieties for the Lewis acids and Lewis angles and you can tell you how these may try to be Lewis acidic We Lewis legs?

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