Question step step one9. The species HdosO, HCO3 – , HSOcuatro – 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.
Concern 22. Ionic equipment from water from the 310 K is actually 2.eight x ten -fourteen What’s the pH of basic liquid at that temperatures? Answer:
Matter 23. The fresh new aqueous services regarding glucose does not run power whereas when salt chloride is actually put into liquids, they conducts strength. Validate it declaration. Answer: step one. Glucose try a non electrolyte while it dissolves in water, there won’t be any ionisation occurs. When there is zero 100 % free ions, it doesn’t run strength.
O is acid
2. Whenever sodium chloride are set in liquids, it’s entirely ionised supply Hartford escort twitter Na ions and Cl – ions. Due to the visibility off ions, they’ll certainly be chances of electhcal conductance. While the ions was carriers away from household current.
step 3. A beneficial Lewis acidic is a keen electron lacking molecule and you may effective at accepting a couple of electrons and you will an excellent Lewis foot try electron rich molecule and you will effective at giving a set of electrons.
Concern twenty five. The salt of good acidic and good legs will not experience hydrolysis. Explain. Answer: step 1. In this case, none new cations nor the anions read hydrolysis. As well as the services remains neutral.
2. Instance, on the aqueous services from NaCl, the ions Na + and you can Cl – ions haven’t any tendency to operate having H + otherwise OH – ions of liquid.
This is because this new you’ll circumstances of such effect try NaOH and you may HCI which happen to be entirely dissociated. Because of this, there’s absolutely no change in the newest concentration of W and you can OH – ions and hence the answer will continue to will still be natural.
Matter step one. Define Lowry – Bronsted principle off acid and feet. Answer: 1. Considering Lowry-Bronsted concept, an acidic is defined as a substance that has a propensity to help you donate an excellent proton to a different substance and feet are a great compound that a tendency to take on good proton from other material.
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 following species to your Lewis acids and you may Lewis bases and you will reveal exactly how these may try to be 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