(Originais Teachy 2023) - Question Easy of Chemistry

Consider a salt that undergoes hydrolysis in water, producing a weak acid and a weak base. How to determine if the final solution will be acidic or basic? How to calculate the final concentration or pH of the resulting solution? Give an example of a salt and calculate the pH of the resulting solution.

One of the most fascinating aspects of Chemistry is the ability to transform and exist in different states of aggregation, depending on temperature and pressure conditions. The phase diagram is a powerful tool that helps us visualize and understand these transitions. Consider a system with a pure substance that can exist in the solid, liquid, and gaseous states. Based on the provided phase diagram, answer the following questions: 1) Identify the triple point and explain its importance in the study of phase equilibria. 2) Describe the anomalous behavior of water based on its phase diagram and discuss the biological and environmental implications of this phenomenon. 3) Select a point on the diagram and justify, based on the phase equilibrium lines, in which state the substance would be if subjected to those temperature and pressure conditions.