Chemical Changes Flashcards
1
Q
Define acid in terms of pH
A
A substance with a pH of less than seven
2
Q
Define acid in terms of ions
A
A substance which releases H+ ions
3
Q
What does (aq) stand for?
A
Aqueous: when something is dissolved in water. E.g. NaCl(aq) is salt water
4
Q
State three common acids and give their formulae
A
Hydrochloric Acid: HCl(aq)
Sulphuric acid: H_2SO_4(aq)
Nitric Acid: HNO_3
5
Q
Which islands do the common acids form in solutions?
A
HCl: H+ and Cl-
H_2SO_4: 2H+ andSO_4^2-
