Question

Hey! I need help with 3 questions! Please&Thank You!
1. If the hydrogen ion concentration of a solution is 10^-10 M is the solution acidic, alkaline, or nuetral?
-acidic
-alkaline
-nuetral
-cannot be determined
2. What is pH?
-the negative logarithm of the hydrogen ion concentration
-the positive logarithm of the hydrogen ion concentration
-the negitive logarithm of the hydroxide ion concentration
-the positive logarithm of the hydroxide ion concentration
3.Which of these solutions is the most basic?
-[H+]=1*10^-2 M
-[OH-]=1*10^-4 M
-[H+]=1*10^-11 M
-[OH-]= 1*10^-13 M

Answer 1

Note: alkaline = basic

Place on a continuum, this is what the pH scale looks like

pH 1 pH=7 pH =14

acidic ->>>>>>>>>>>> neutral << <<<<<<<<<- basic


from the equation \(pH=-log[H^+]\)

you can verify that at pH=1; \([H^+]=0.1~M\)

pH=7; \([H^+]=1.0*10^{-7}~M\)

pH=14; \([H^+]=1.0*10^{-14}~M\)

Answer 2

Any concentration above pH 7 is basic while below is acidic