Question 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 out-of liquid at 310 K is 2.7 x ten -fourteen What’s the pH off neutral h2o at this temperature? Answer:
Matter 23. The latest aqueous services regarding sugar will not perform energy whereas whenever sodium chloride are put in h2o, they performs fuel. Justify which declaration. Answer: step one. Sugar try a low electrolyte while they dissolves within the water, there will be no ionisation happen. If there’s no totally free ions, it will not conduct fuel.
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dos. Whenever salt chloride was set in h2o, it is totally ionised provide Na ions and you can Cl – ions. Because of the visibility regarding ions, they’ll certainly be chances of electhcal conductance. As ions is actually companies off electric current.
3. A beneficial Lewis acid is an electron deficient molecule and you may effective at accepting a pair of electrons and you will a Lewis feet is electron rich molecule and you may effective at giving a set of electrons.
Question 25. The fresh salt of good acidic and you can solid base cannot experience hydrolysis. Establish. Answer: step 1. In cases like this, none the brand new cations nor the brand new anions go through hydrolysis. Additionally the provider remains natural.
2. Such as for instance, regarding aqueous service off NaCl, its ions Na + and you can Cl – ions do not have habit of perform with H + or OH – ions away from liquids.
The reason being the fresh new you can easily things of these impulse is actually NaOH and HCI being entirely dissociated. Consequently, there isn’t any improvement in the newest intensity of W and you may OH – ions so because of this the solution will continue to are still natural.
Matter step 1. Define Lowry – Bronsted concept out of acidic and you may foot. Answer: step one. Centered on Lowry-Bronsted theory, an acidic is defined as a compound having a tendency in order to donate a proton to another compound and ft are an excellent material that a tendency to deal with a 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. live escort reviews Pittsburgh 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 next types into the Lewis acids and you may Lewis angles and you may reveal exactly how these can 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