Calculate the molar it’s of nitric acid
Answer:
Weak acid
Explanation:
A titration curve is a graphical description of the change in pH of the solution in the conical flask as the reagent is added from the burette. A titration curve can be plotted for the different kinds of acid and base titrations. The volume of the titrant is always plotted as the independent variable and the pH of the solution as the dependent variable. The equivalence point is read off from the titration curve. A titration curve is very important because it shows the pH at various points during the titration.
A weak acid/strong base titration leads to an equivalence point above 7. From the question, we were told that the pH at equivalence point lies around 8. Hence the unknown substance must be a weak acid.
Answer:
Conducting experiments and using the scientific method.
Explanation:
Scientists (and other people) test hypotheses by conducting experiments. The purpose of an experiment is to determine whether observations of the real world agree with or conflict with the predictions derived from a hypothesis. If they agree, confidence in the hypothesis increases; otherwise, it decreases.
We know that, Molality =
Given: Molality of solution = 2.25 m
Weight of solvent = 30 g = 0.030 kg
Molecular weight of AlCl3 = 133.34 g/mol
Therefore we have, 2.25 =
∴, weight of solute (g) = 9.00 g
Thus, <span>
9.00 g of AlCl3 is required to make a 2.25m solution in 30.0 g of water</span>