Zadania z chemii IB SL

What can be produced when pentanoic acid is reduced? A. Pentan-1-one B. Pentan-2-one C. Pentan-1-ol D. Pentan-2-ol

Which of these changes will increase the time taken for this reaction to go to completion? $\ce{Zn(s) + H2SO4(aq) -> ZnSO4(aq) + H2(g)}$ A. Increase the temperature B. Increase the concentration of $\ce{H2SO4}$ C. Use powdered zinc instead of zinc granules D.…

What can be deduced about this equilibrium reaction from these data? $\ce{A(g) + B(g) <=> 2C(g)}$ Temperature / K Equilibrium constant, K 280 400 340 40.0 A. It is an exothermic reaction and [products] < [reactants] at equilibrium. B. It is an endothermic…

Which change would shift the position of this equilibrium towards the products? $\ce{H2(g) + I2(g) <=> 2HI(g)}$ $\Delta H = -9\ \mathrm{kJ\,mol^{-1}}$ A. Increase pressure B. Decrease pressure C. Increase temperature D. Decrease temperature

Which statement about this reaction is correct? $\ce{2Cl2 + O2 -> 2Cl2O}$ A. Chlorine is the reducing agent. B. Oxygen is the reducing agent. C. Chlorine is reduced. D. Oxygen is oxidized.

Which of these reactions will occur spontaneously? I. $\ce{KI + Br2}$ II. $\ce{KBr + Cl2}$ III. $\ce{KCl + Br2}$ A. I and II only B. I and III only C. II and III only D. I, II and III

Which combination is correct for this cell, when nickel is more reactive than silver? A. Cathode: silver; anode: nickel; sign on cathode: -; sign on anode: + B. Cathode: nickel; anode: silver; sign on cathode: -; sign on anode: + C. Cathode: nickel; anode:…

What are the products of the electrolysis of molten lead(II) bromide? A. Product at cathode: lead; product at anode: bromine B. Product at cathode: lead; product at anode: bromide C. Product at cathode: bromine; product at anode: lead D. Product at cathode:…

Which equation is correct? A. $\ce{Cu(s) + H2SO4(aq) -> CuSO4(aq) + H2(g)}$ B. $\ce{Al(s) + H2SO4(aq) -> AlSO4(aq) + H2(g)}$ C. $\ce{Zn(s) + H2SO4(aq) -> ZnSO4(aq) + H2(g)}$ D. $\ce{Fe(s) + H2SO4(aq) -> FeSO4(aq) + H2(l)}$