(Originais Teachy 2023) - Question Easy of Chemistry

When sodium hydroxide (NaOH) is solubilized in water, the process of ionic dissociation occurs, in which the substance splits into positive and negative ions. Consider an experiment in which 2.8 g of NaOH are completely dissolved in water, resulting in 250 mL of solution. Knowing that the molar mass of NaOH is 40 g/mol and that the density of water at 25°C is approximately 1 g/mL, calculate: 1) The concentration (in mol/L) of hydroxide ions (OH-) in the resulting solution from the dissociation of NaOH. 2) The amount of hydroxide ions (OH-) present in this solution. Use solubility rules to determine the complete dissociation of NaOH in water.