Answer:
HCl solution - H30+ and Cl ions. pH 3
NaCl - Na+ and Cl-. pH 7
Explanation:
a) HCl solution - the hydrogen ion combines with water molecule to form the hydronium molecule which is responsible for acidity. The chloride ion is also found in solution.
pH = -log [H+] = -log(10^-3) = 3
b) NaCl 10-3 g. The solid dissocates in water forming the Na+ and Cl- ions. None of these ions affect pH
To balance the reaction, we look at the number of atoms of each element we have. It should be equal for both sides. The balanced reaction is:
<span>
Al2(SO4)3 + 3Ca(OH)2 = 2Al(OH)3 + 3CaSO4
The ratio of calcium hydroxide and aluminum hydroxide is 3:2.</span>
Since the colors moved faster in the hit water, it means that the water molecules in the hot water move faster than the molecules in the cold water.
