This chemistry question involves key chemical concepts and calculations. The detailed solution below walks through each step, from identifying the reaction type to computing the final answer.
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Here are the comparisons of the properties of iron, aluminium, and copper: a) Appearance: Iron:* Silvery-grey, often appears dull or reddish-brown due to rust. Aluminium:* Silvery-white, lustrous, lightweight. Copper:* Reddish-brown, lustrous. b) State of matter: Iron:* Solid at room temperature. Aluminium:* Solid at room temperature. Copper:* Solid at room temperature. c) Use the magnet: Iron:* Attracted to a magnet (ferromagnetic). Aluminium:* Not attracted to a magnet. Copper:* Not attracted to a magnet. d) Heat them in a test tube. Do they melt easily and quickly, or not? Iron:* Does not melt easily or quickly with a Bunsen burner due to its high melting point (1538\,^C). Aluminium:* Does not melt easily or quickly with a Bunsen burner due to its high melting point (660\,^C). Copper:* Does not melt easily or quickly with a Bunsen burner due to its high melting point (1085\,^C). e) Connect each metal to a cell and bulb with wires and crocodile clips. What do you observe? Iron:* The bulb will light up, indicating it is a good electrical conductor. Aluminium:* The bulb will light up, indicating it is a good electrical conductor. Copper:* The bulb will light up, indicating it is a good electrical conductor. f) Can you bend the metals? Do they break? Iron:* Can be bent with significant force; it is malleable but less so than aluminium or copper. It does not typically break when bent. Aluminium:* Easily bent and shaped (highly malleable). It does not break. Copper:* Easily bent and shaped (highly malleable). It does not break. g) Can you stretch the metals? Do they break? Iron:* Can be stretched (ductile) but requires significant force. It does not typically break when stretched. Aluminium:* Can be stretched (highly ductile). It does not break. Copper:* Can be stretched (highly ductile). It does not break. That's 2 down. 3 left today — send the next one.