Chad's free videos and the possibility of not using a calculator

[FireandIce128]

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Hey guys,

So I'm using Chad's free videos now, and they are good! My only problem is that some of the problems he covers rely heavily on using a calculator.

For example, in the Acid-Base Equilibrium chapter, one of the questions is "What is the pH of a 0.1 M solution of acetic acid? (Ka = 1.76 x 10^-5)"
In order to find the pH, we have to use an "ICE" chart, and it boils down to 1.76 x 10^-5 = x^2/0.1, which we find that x =o.oo13M, and when we take the -log of that using our calculator, we find the pH is 2.9.
My problem is, we're not going to use a calculator during the DAT. So is Chad just going over problems like these just to give us the gist of things? Or do I need more practice?

Also, since the organic chemistry section on his free videos site have not been restored yet, I'm gonna have to purchase a month subscription of his course saver videos. Though I don't know if I have enough time to review the general chemistry section on his course saver, is the questions on his course saver similar to what I just mentioned when it comes to gen chem and calculator use?

 

[BeaverLover]

I think he does a solid job on how to estimate log calculations on his QR section

 

[Likkriue]

You Need to be able to do logs in your head. Takes practice and isn't hard.

 

[The Tooth Dr]

Try going through some untimed practice problems and don't allow yourself to use a calculator. Tricky to pick up right away but after some trial and error you'll get the hang of it