Now, we're going to begin by assuming something called electroneutrality. So electroneutrality means that all the negative charges cancel out all the positive charges on the inside, and likewise all the negative charges of all the negatively charged ions cancel out all the positive charges of all the positively charged ions. So this is known as electron neutrality. So the outside and the inside are neutral with respect to the charge. So we're going to begin by assuming that. Now the question is let's take a look at the following concentration amount.