5 Percent Rule

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Labiba Sardar 2A
Posts: 103
Joined: Sat Jul 20, 2019 12:15 am

5 Percent Rule

Postby Labiba Sardar 2A » Tue Feb 11, 2020 5:57 pm

When you're doing the 5 percent rule, are you checking to see if the x value that you solved for is 5% of the initial concentration of your reactant? What if there's multiple reactants with initial concentrations?

jisulee1C
Posts: 149
Joined: Thu Jul 25, 2019 12:17 am

Re: 5 Percent Rule

Postby jisulee1C » Tue Feb 11, 2020 6:00 pm

Yes, you use the five percent rule to check if the product concentration formed is less than five percent of the initial concentration which allows you to use the approximation. Use the reactant with the smallest concentration given. If it passes the five percent rule for the smaller concentration then that means it will most definitely pass the five percent rule for the other reactants and their concentrations.


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