Problem: In the hydrogenation of ethylene using a nickel catalyst, the initial concentration of ethylene is 1.55 mol . L-1 and its rate constant (k) is 0.0014 mol . L-1 . s-1.Determine the rate of reaction if it follows a zero-order reaction mechanism. Express your answer to two significant figures and include the appropriate units.

FREE Expert Solution

We're asked to determine the rate of reaction of the hydrogenation of ethylene if it follows a zero-order reaction mechanism:


Recall that the rate law only focuses on the reactant concentrations and has a general form of:


rate law=kAxBy

k = rate constant
A & B = reactants
x & y = reactant orders


For a zero-order mechanism, reactant orders = 0, which means: 

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Problem Details

In the hydrogenation of ethylene using a nickel catalyst, the initial concentration of ethylene is 1.55 mol . L-1 and its rate constant (k) is 0.0014 mol . L-1 . s-1.

Determine the rate of reaction if it follows a zero-order reaction mechanism. Express your answer to two significant figures and include the appropriate units.

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Rate Law concept. You can view video lessons to learn Rate Law. Or if you need more Rate Law practice, you can also practice Rate Law practice problems.

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Based on our data, we think this problem is relevant for Professor Iranpour's class at HCC.