In: Chemistry
how does the reactivity of aluminum foil and aluminum sheet differ with (water, HCL and acetic acid)?
What is aluminium?
Aluminium is a chemical element in the boron group with symbol Al and atomic number 13. It is a silvery-white, soft, nonmagnetic, ductile metal. Aluminium is the third most abundant element (after oxygen andsilicon), and the most abundant metal, in the Earth's crust. Aluminium is remarkable for the metal's low density and for its ability to resist corrosion due to the phenomenon of passivation.
What is aluminium foil?
It is a tin foil prepared in thin metal leaves with a thickness less than 0.2 mm (7.9 mils); thinner gauges down to 6 micrometres (0.24 mils) are also commonly used.Aluminium foil is produced by rolling sheet ingots cast from molten billet aluminium, then re-rolling on sheet and foil rolling mills to the desired thickness, or by continuously casting and cold rolling. To maintain a constant thickness in aluminium foil production.
What is aluminium sheet?
aluminium sheet is the very thick and hard due to the concentration of metal ingredients the sheet may be contains alalgum also. The main differences between aluminium foil and aluminium sheet is the thickness and concentrations of metals.
Reaction with Water
these two also produced Hydrogen in the reaction between water and aluminium foil ans as well as aluminium sheet. The hydrogen produced via such aluminium and water reactions might be employed to power fual cell devices for portable applications such as emergency generators and laptops.
2Al + 6H2O = 2Al(OH)3 + 3H2 (1)
2Al + 4H2O = 2AlO(OH) + 3H2 (2)
2Al + 3H2O = Al2O3 + 3H2 (3)
The first reaction forms the aluminum hydroxide bayerite (Al(OH)3) and hydrogen, the second reaction forms the aluminum hydroxide boehmite (AlO(OH)) and hydrogen, and the third reaction forms aluminum oxide and hydrogen. All these reactions are thermodynamically favorable from room temperature.
Reaction with HCL
This reaction is between a metal and an acid which typically results in a salt and the release of hydrogen gas. Aluminum reacts with hydrochloric acid to produce aluminum chloride and hydrogen gas.
2Al(s) + 6HCl(aq) -> 2AlCl3(aq) + 3H2(g)
The aluminum Al+3 combines with the chloride (Cl−) from the acid to form the saltAlCl3. It takes 3 chloride ions to balance the charge of the 1 aluminum ion.
Al+6HCl→3H2+2AlCl3
We begin the balancing by finding a common multiple for the hydrogen and the chlorine. In this case 6 which is accomplished by adding coefficients of 6 in front of HCl, 3 in front of H2 and 2 in front of AlCl3.
2Al+6HCl→3H2+2AlCl3
Reaction with acetic acid
A reaction between aluminum and (glacial) acetic acid to produce aluminum acetate, hydrogen, and some heat.
Al + CH3COOH = Al(C2H3O2)3 + H2 + heat