E-CodeICE table: equilibrium concentrations — a TI-84 Plus CE program
ICEEQ is a TI-BASIC program for the TI-84 Plus CE. General aA + bB ⇌ cC + dD with any starting concentrations and K: solves the ICE table for the shift x (forward or backward, by bisection on ln Q = ln K) and shows every equilibrium concentration with a Q/K check.
What it asks for and what it shows
It asks for 3 values at its prompts. In the example below it shows X, [A], [B], [C], [D], Q/K.
Example run
One of its oracle test cases: “H2+I2⇌2HI, K 50.5”. The inputs are typed in order, and the results are the values the case expects on the screen.
| Step | Value |
|---|---|
| You enter | |
| Input 1 | {1,1,2,0} |
| Input 2 | {1,1,0,0} |
| Input 3 | 50.5 |
| The screen shows | |
X= | 0.7803726795 |
[A]= | 0.2196273205 |
[B]= | 0.2196273205 |
[C]= | 1.560745359 |
[D]= | 0 |
Q/K= | 1 |
How it's checked
8 test cases, each checked against an independent method. Replayed key by key on a virtual TI-84 Plus CE, they make 54 checks.
How E-Code checks every program
Run it or put it on your calculator
- Open the library in the TI-84 Plus CE calculator and pick “ICE table: equilibrium concentrations” (ICEEQ).
- Put it on your own calculator with a computer and a USB cable, or type it in by hand.
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- Weak-acid titration and buffer pH
All TI-84 Plus CE chemistry programs · All TI-84 Plus CE programs