If the hydrogen ion concentration is 0.00000001 moles per liter, this would be a solution with a pH of 8, which would be a basic solution. Here is how this was determined: By definition, using [H+] to represent the concentration of the hydrogen ions in moles per liter, p H = − l o g 10 [ H + ] If we take the equation for pH and fill it in with the H+ concentration, we can then CALCULATE the pH: p H = − l o g 10 [ H + ] p H = − l o g 10 0.00000001 p H = 8 Thus, the pH would be 8. Examples of solutions with pH 8 would be SEAWATER or baking soda solution. A solution with pH 8 is a base since the pH is above 7. Solutions with pH exactly 7 would be neutral, and those with a pH below 7 would be acidic, and those with a pH above 7 would be basic. Let's take a look at another example. Let's say that the hydrogen ion concentration of a solution was 0.001 moles per liter. What would the pH be for that solution? We can use the same equation, just filling in the hydrogen ion concentration with 0.001: p H = − l o g 10 [ H + ] p H = − l o g 10 0.001 p H = 3 This would be a very acidic solution, similar to what we might FIND in a carbonated beverage or in the gastric juices in our stomach.Explanation: