pH changes on dilution Flashcards
1
Q
what does a pH of 1 have compared to 2?
A
10 times the concentration of H+ ions as a solution with a pH of 2
2
Q
what has more H+ ions, pH 1 or pH 2?
A
- pH 1
3
Q
Calculate how many times more hydrogen ions there are in 1dm3 solution of pH3 than a 1dm3 solute ion of pH9.
A
pH 3 to pH 9 is plus 6
- 1x10^6
4
Q
How would you calculate the pH of the solution of HCl in 25cm3 of 0.050moldm-3 is diluted to 75cm3 with water?
A
- 75 divided by 3 is 25
- there would be less H+ ions in the 75cm3
- so then you would divide the 0.050 by 3
- 0.01667moldm-3
- pH = -log(0.01667)
- pH = 1.78
