Question step 19. The species HdosO, HCOstep 3 – , 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.
Matter twenty two. Ionic tool from liquid at the 310 K are dos.eight x 10 -14 What is the pH out of neutral liquids at this temperatures? Answer:
Matter 23. The new aqueous provider of glucose does not make electricity whereas whenever salt chloride is babylon escort Spokane Valley put in water, it conducts energy. Justify which statement. Answer: step 1. Glucose is a low electrolyte whenever it dissolves within the water, there won’t be any ionisation happen. If there’s no totally free ions, it generally does not conduct power.
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dos. When salt chloride are placed into liquid, it is completely ionised to give Na ions and you will Cl – ions. Due to the visibility off ions, they’ll certainly be likelihood of electhcal conductance. Because the ions are carriers regarding electric current.
step three. A good Lewis acidic try a keen electron lacking molecule and you can capable of acknowledging a pair of electrons and you will a beneficial Lewis foot try electron rich molecule and effective at donating a set of electrons.
Question 25. The newest salt regarding solid acid and you can strong ft doesn’t experience hydrolysis. Describe. Answer: step one. In cases like this, neither the brand new cations neither this new anions read hydrolysis. And also the provider stays natural.
dos. Such as, regarding aqueous services out of NaCl, its ions Na + and you will Cl – ions don’t have any tendency to operate with H + otherwise OH – ions away from liquid.
For the reason that the fresh new you’ll facts of such impulse is NaOH and HCI which can be totally dissociated. As a result, there isn’t any improvement in the new concentration of W and OH – ions and therefore the solution continues to will always be natural.
Matter step one. Define Lowry – Bronsted theory out-of acidic and legs. Answer: 1. Predicated on Lowry-Bronsted idea, an acid is understood to be a substance that has a propensity to help you give good proton to another substance and you may ft is actually good substance that has a propensity to accept good 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. In this case, ammonia (NH3) acts as a base and H2
Categorize the following variety to the Lewis acids and you may Lewis angles and you can reveal how these can play the role of Lewis acidic I Lewis base?
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