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 – babylon escort Kansas City MO (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 off h2o during the 310 K are dos.seven x 10 -14 What’s the pH regarding basic drinking water at this heat? Answer:

Concern 23. The latest aqueous solution regarding sugar will not carry out strength while when sodium chloride is set in liquids, it performs fuel. Validate that it statement. Answer: 1. Sugar try a non electrolyte and when they dissolves in water, there will be no ionisation occurs. If there’s zero 100 % free ions, it does not run stamina.

O are acid

2. When sodium chloride is actually put into liquid, it’s entirely ionised to give Na ions and you will Cl – ions. Considering the exposure out-of ions, they shall be possibility of electhcal conductance. Since ions try carriers from electric current.

step three. Good Lewis acidic are a keen electron lacking molecule and you may able to taking a couple of electrons and you can a great Lewis foot was electron steeped molecule and you will capable of giving a couple of electrons.

Concern twenty five. The fresh new salt off solid acid and you may solid legs doesn’t undergo hydrolysis. Explain. Answer: step one. In cases like this, neither brand new cations neither the newest anions proceed through hydrolysis. And also the service stays natural.

dos. Such, regarding the aqueous solution out-of NaCl, their ions Na + and you may Cl – ions do not have habit of function with H + or OH – ions out of drinking water.

For the reason that the latest you can easily points of these response is actually NaOH and you can HCI which can be completely dissociated. Thus, there is absolutely no change in the fresh concentration of W and OH – ions thus the solution continues to continue to be simple.

Concern 1. Explain Lowry – Bronsted principle of acidic and you can feet. Answer: step 1. Predicated on Lowry-Bronsted principle, an acidic is understood to be a substance having a tendency so you’re able to donate a beneficial proton to some other substance and you may foot are an excellent substance who may have a propensity to accept an effective 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 next varieties toward Lewis acids and you can Lewis angles and you can tell you how these could play the role of Lewis acid We Lewis ft?

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