Zadania z chemii IB HL

Cadmium was added to separate solutions of silver nitrate and chromium(III) nitrate. $\ce{Cd(s) + 2AgNO3(aq) -> Cd(NO3)2(aq) + 2Ag(s)}$ $\ce{Cd(s) + Cr(NO3)3(aq)}$: no reaction Which list places the three metals in order from most reactive to least reactive?…

Which diagram correctly shows the heterolytic fission of the carbon-bromine bond in bromomethane? A. Diagram A B. Diagram B C. Diagram C D. Diagram D

What is the standard cell potential, $E^\ominus_\text{cell}$, of the following cell? $\ce{Pb^2+(aq) + 2e- <=> Pb(s)}$ $E^\ominus = -0.13\ \mathrm{V}$ $\ce{Zn^2+(aq) + 2e- <=> Zn(s)}$ $E^\ominus = -0.76\ \mathrm{V}$ A. $-0.89\ \mathrm{V}$ B. $-0.63\ \mathrm{V}$…

Molten lead(II) bromide, $\ce{PbBr2(l)}$, is electrolysed using inert electrodes. Which products form at the electrodes? A. Anode: $\ce{Br2}$, cathode: $\ce{Pb}$ B. Anode: $\ce{O2}$, cathode: $\ce{Pb}$ C. Anode: $\ce{Pb}$, cathode: $\ce{Br2}$ D. Anode:…

What is the role of the hydroxide ion in the reaction of 2-bromopropane with warm aqueous sodium hydroxide? $\ce{CH3CHBrCH3 + OH- -> CH3CH(OH)CH3 + Br-}$ A. Nucleophile and Lewis acid B. Electrophile and Lewis acid C. Nucleophile and Lewis base D. Electrophile…

Which change represents oxidation of the functional group? A. $\ce{CH3COCH3 -> CH3CH(OH)CH3}$ B. $\ce{CH3CH(OH)CH3 -> CH3COCH3}$ C. $\ce{CH3CH2COOH -> CH3CH2CHO}$ D. $\ce{CH3CH=CH2 -> CH3CH2CH3}$

Reduction of which compound gives pentan-2-ol? A. Pentan-2-one B. Pentan-3-one C. Pentanal D. Pentanoic acid

The pH curve below was obtained when sodium hydroxide solution was added to a sample of ethanoic acid until the base was in excess. Which indicator would be most suitable for this titration? A. Methyl red, p$K_\mathrm{a}$ = 5.1 B. Phenolphthalein,…

What are the products of the electrolysis of concentrated aqueous sodium chloride using inert electrodes? In each option the product at the anode is given first and the product at the cathode second. A. chlorine gas, hydrogen gas B. chlorine gas, sodium metal…