Generate brand new conjugate acids for the next Bronsted basics: NH

Question 19. The species H_dosO, HCO_{step step 3} – , 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.

Question 22. Ionic equipment from water at the 310 K is actually 2.7 x 10 -fourteen What is the pH off natural h2o at that heat? Answer:

Concern 23. The newest aqueous services out of sugar cannot perform electricity while when sodium chloride is placed into h2o, they conducts stamina. Validate that it statement. Answer: step one. Glucose are a non electrolyte assuming it dissolves in water, there will be no ionisation escort Jacksonville happen. When there is no totally free ions, it generally does not make power.

O was acid

dos. When salt chloride is placed into h2o, it is totally ionised giving Na ions and you may Cl – ions. Considering the visibility out-of ions, they’ll certainly be chances of electhcal conductance. Because the ions is companies out-of electric energy.

step 3. A Lewis acid was an electron lacking molecule and you will able to acknowledging a set of electrons and you may a good Lewis base are electron steeped molecule and you will capable of donating a couple of electrons.

Concern twenty-five. The latest salt of good acidic and good base doesn’t undergo hydrolysis. Explain. Answer: step 1. In this instance, neither brand new cations nor the brand new anions go through hydrolysis. And the solution stays neutral.

dos. Eg, regarding aqueous provider from NaCl, their ions Na + and you can Cl – ions have no habit of function which have H + otherwise OH – ions regarding h2o.

The reason being the fresh possible situations of these impulse are NaOH and HCI that are completely dissociated. Thus, there’s no change in the brand new concentration of W and you can OH – ions so because of this the solution continues to remain neutral.

Concern 1. Establish Lowry – Bronsted principle out-of acidic and you will legs. Answer: step 1. Predicated on Lowry-Bronsted idea, an acid means a compound who has got a tendency to contribute a proton to a different material and foot try an effective substance who has a tendency to accept good 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

Categorize the following kinds towards Lewis acids and you will Lewis bases and you can inform you how these could act as 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