Hello!
Percentage error = (true value - measured value)/true value x 100%
Percentage error = (27.7-27.0)/27.7 x100% = 25.3%
D-1 electron in their outer energy level.
Vinegar pH 3.2: Weak acid
Battery acid pH 0.5: Strong acid
Shampoo pH 7.0: Neutral
Ammonia pH 11.1 Strong base
Answer:
The process of dissolving is exothermic when more energy is released when water molecules “bond” to the solute than is used to pull the solute apart. Because more energy is released than is used, the molecules of the solution move faster, making the temperature increase.
Project the image Endothermic Dissolving.
The process of dissolving is endothermic when less energy is released when water molecules “bond” to the solute than is used to pull the solute apart. Because less energy is released than is used, the molecules of the solution move more slowly, making the temperature decrease.
Fe^2 O^3 + 6HCl --> 2FeCl^3 + 3H^2 O
