That last test though

So the test was not was what i was expecting it to be. The last part of it with the ice box problems was not my favorite. just in case anyone else had this problem here is the method to do them. Take the Equation X squared over the molarity minus X and set that equal to ka (unless it is less than kw). multiply the equation out to equal zero. Then Find the zeros of the equation on a graph or use the quadratic equation. Finally take this final number and use it as the [H+] to find ph.