1. Indicate which is Lewis acid, and which is Lewis base: - PH, Fe CH;NH2, NO,K
ID: 1037619 • Letter: 1
Question
1. Indicate which is Lewis acid, and which is Lewis base: - PH, Fe CH;NH2, NO,K 2. The following reaction is taking place in aqueous solution: Identify the Bronsted Acid, base, conjugate acid and conjugate base 3. Using hard-soft concepts, Predict if the equilibrium constant will be 1 (Unless otherwise stated, assume gas-phase or hydrocarbon solution and 25°C). [AuCb]-(aq) + 2CN" (aq) [Au(CN)2]-(aq) + 2 Cl_ (aq) 4. In an XRD analysis using a wavelength of 154 pm, a crystalline sample of a layered gave peaks at 24.2°, 36.3°, and 48.4° (20-12.1°). What is likely to be the value of the distance (d) between the layers? (n2. -2 d sin0, assume n-1) 24.20, 36.3, and 48.4° (20 12.1°). 5. Carbon monoxide (CO) can bind metals forming metal complexes, using the hard-soft concept and table, determine with which of the following species, CO, may form a very stable bond: 6. Potassium chlorite i O2 to Cl2 What is the overall change in the oxidation number of chlorine for this reaction'? is a powerful oxidizing agent when changing from C 7. About the cell reaction: Zn(s) + Cu20aq)-Cu(s) + Zn20aq) ( Ered (Zr?)--0.762 V, Erd (Cu2+)-0.342 V) Draw the electrochemical cell indicating anode, cathode electrolyte, electrodes saline bridge and direction of flow of electrons, make the cell diagram and calculate the cell potential in standard conditions 8. According to the hard and soft acid and bases, indicate with an arrow the direction of the favored reaction (? or ?) CuCl+ LiSCH CHCuSCH CHs + LiC 9 Consult the Ellingham diagram and determine which is the minimum temperature at which Fe will reduce ZnOExplanation / Answer
1) According to Lewis concept, Acids are electron pair acceptor.
In this contex, all cations are electron deficient and hence can accept electron and hence act as acids. Exp - Fe2+, K+
More over, some neutral deficient specis can also accept electrons and hence act as acids. Exp- PH3(contains sextet of electrons )
Bases are on the otherhand electron rich specis and hence can donate electrons.
In this context, anions act as bases, Exp- NO3-
More over, neutral electron rich specis can also donate electrons and hence act as base,
Exp- CH3NH2 (donates the lone electron on ni)trogen
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