Dickson

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You should understand that pH measures the concentration of hydrogen ions. You are mixing the 2 concepts here. HCl(aq) can be said to be neutral with respect to charges. We have an equal number of positive and negatively charged ions, therefore the net charge is zero. However when you refer to pH, you are trying to measure the acidity of the solution. The acidity corresponds to the concentration of hydrogen ions. In water, HCl ionizes to form mobile hydrogen and chloride ions. This give rise to the lower pH.

What is the formula for finding the roots of a cubic equation?

Profit = $700-$500 =$200 Therefore %profit = (profit/original price) x 100% =(200/500) x 100%