Determine the pH of different solution with the help of pH paper Flashcards
1
Q
What is pH?
A
power of hydrogen is a measure of concentration ion in a solution.
1
Q
what is Kw?
A
Kw (ionization constant) is the measure of strength of acid or base
2
Q
If a pH of a solution is 5.5. What will be its POH
A
pH+POH=14 ______POH=14 - 5.5________POH=8.5
3
Q
why are antacids used in acidity of a stomach?
A
they neutralize the acid in the stomach to relieve indigestion
4
Q
what is the advantage of finding pH of a soil?
A
having an optimum pH is important for plants to grow and for energy
5
Q
what is the pH of a human blood?
A
it ranges between 7.35—7.45
6
Q
name some natural substances that behave like bases ?
A
NaOH, CaCO3, KOH, Ca(OH2), Mg(OH2), LiOH
7
Q
what are indicators
A
substances whose solution color changes when pH is changed eg. phenolphthalein
