a series of experiments to reactant concentration on the rate of rusting for iro

Question

a series of experiments to reactant concentration on the rate of rusting for iron metal in water. Each trial uses a 1.50 g sample of iron metal in 15.00 mL of pure water in a large test tube. maintains constant temperature while oxygen the test tube at a constant rate. The student measures the using absorbance spectrophotometry after a set time has elapsed. A hot water bath of concentration of the product formed in each trial gas Trial 1 20 Trial 2 Trial 5Trial 6 Trial 3 Trial 4 20 shavings |50% O2 20°C Type of iron metal Oxygen sour e nai lair, 20% 02 | air, 20% O2|50% O2 nail shavings nail shavings 150% O2 |air, 20% O2 Which trial would be expected to have the fastest rate of rusting? O Trial 1 O Trial 2 O Trial 3 O Trial 4 O Trial 5 O Trial 6 O Previous Check Answer O Neri Exit Hint

Explanation / Answer

Iron shavings have a higher surface area than an iron nail of the same mass. Rusting is a chemical process in which the metal reacts with oxygen to form the metal as the equation describes. As more metal is exposed to the atmosphere, more is the rusting.

Also Arrhenius law states that at a higher temperature the reaction occurs at a higher rate as the activation energy is lowered.

So, it is safe to say that in Trail 3, the rusting would be the fastest.

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