Build the latest conjugate acids for the following Bronsted bases: NH

Question 19. The species H_dosO, HCO₃ – , 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 h2o from the 310 K try 2.eight x 10 -14 What is the pH of neutral liquids at this temperature? Answer:

Question 23. Brand new aqueous services of sugar doesn’t make energy whereas when sodium chloride are put into liquids, they performs fuel. Justify this declaration. Answer: 1. Sugar is a low electrolyte just in case they dissolves in water, there will be no ionisation happens. If there is no totally free ions, it generally does not make strength.

O try acidic

2. Whenever salt chloride was put into water, it’s completely ionised to give Na ions and Cl – ions. As a result of the visibility of ions, they shall be likelihood of electhcal conductance. As the ions is actually carriers from household current.

3. A great Lewis acid try an electron lacking molecule and ready recognizing a couple of electrons and you can an excellent Lewis ft is actually electron rich molecule and you will ready giving a couple of electrons.

Matter twenty-five. This new salt out-of strong acid and good base will not read hydrolysis. Explain. Answer: step one. In such a case, neither this new cations nor the anions go through hydrolysis. Plus the services remains neutral.

dos. Particularly, regarding the aqueous solution out of NaCl, their ions Na + and you may Cl – ions do not have habit of function which have H + or OH – ions away from water.

For the reason that the latest you can circumstances of such response is actually NaOH and you will HCI which happen to be entirely dissociated. This means that, there’s absolutely no change in the newest concentration of W and you may OH – ions thus the solution will continue to will still be neutral.

Concern step one. Define Lowry – Bronsted idea out-of acid and you can feet. Answer: step 1. Based on Lowry-Bronsted principle, an acidic means a material who may have a tendency to help you donate an excellent proton to a different compound and base is a great material that has a propensity to take on a beneficial proton off their 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

Identify the next varieties for the Lewis acids and Lewis bases and you will let you know how these may play the role of Lewis acid I 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