Question step step 19. The species HdosO, 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.
Matter twenty-two. Ionic equipment away from h2o on 310 K is actually 2.seven x 10 -fourteen What is the pH away from simple h2o at that heat? Answer:
Question 23. The newest aqueous services out-of glucose does not run stamina whereas whenever salt chloride is put into liquid, they conducts power. Justify so it statement. Answer: step 1. Sugar is a non electrolyte and in case they dissolves within the water, there won’t be any ionisation happens. If there is no free ions, it does not make energy.
O try acidic
2. When sodium chloride try put in h2o, it’s entirely ionised giving Na ions and Cl – ions. Because of the exposure regarding ions, they will be possibility of electhcal conductance. As ions is actually providers out of electric current.
step three. Good Lewis acid are an electron deficient molecule and you can able to accepting a couple of electrons and you can good Lewis ft is electron steeped molecule and you can with the capacity of giving a set of electrons.
Matter twenty-five. The new sodium out-of solid acidic and you may solid ft doesn’t proceed through hydrolysis. Determine. Answer: step 1. In this instance, none the new cations nor the anions undergo hydrolysis. As well as the service stays simple.
2. Such as for example, regarding aqueous services off NaCl, their ions Na + and Cl – ions haven’t any habit of act which have H + or OH – ions from liquids.
This is because this new you’ll products of these impulse try NaOH and HCI being totally dissociated. As a result, there’s no change in brand new intensity of W and OH – ions and therefore the solution continues to are still simple.
Question step one. Identify Lowry – Bronsted theory away from acid and you may base. Answer: step 1. Centered on Lowry-Bronsted theory, an acidic is defined as a substance who may have a tendency in order to donate a good proton to a different compound and feet is actually a good substance who has got a propensity to accept an effective proton off their 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. escort in Indianapolis In this case, ammonia (NH3) acts as a base and H2
Classify the second variety for the Lewis acids and Lewis angles and you may let you know exactly how these may act as Lewis acid We Lewis feet?
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