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When a small amount of hydrochloric is added to a solution of Na2HPO4the pH of the solution does not change?
When a small amount of hydrochloric acid (HCl) is added to a solution of Na₂HPO₄, the pH remains relatively stable because Na₂HPO₄ acts as a buffering agent. The phosphate ions in the solution can react with the added H⁺ ions from HCl, forming H₂PO₄⁻, which helps to resist significant changes in pH. This buffering action allows the solution to maintain its pH despite the addition of a strong acid. Thus, the pH remains relatively unchanged within a certain range.
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What happens when HCL is added to solution with a pH of 7.45?
When hydrochloric acid (HCl) is added to a solution with a pH of 7.45, the acidity of the solution increases. HCl dissociates into hydrogen ions (H⁺) and chloride ions (Cl⁻), which lowers the pH as the concentration of hydrogen ions rises. The solution will become more acidic, moving toward a pH closer to neutral (7) or even below, depending on the amount of HCl added. This change can affect various chemical equilibria and biological processes that are sensitive to pH.
The heat energy absorbed or released when a specific amount of solute dissolves in a solvent is the?
The heat energy absorbed or released when a specific amount of solute dissolves in a solvent is called the heat of solution or enthalpy of solution. It represents the overall energy change associated with the dissolution process.
What is consturated solution?
A saturated solution is a solution that has reached the maximum amount of solute that can dissolve in it at a given temperature. As the temperature changes, the maximum solubility can also change. When a solution has a concentration higher than the maximum solubility, it is said to be supersaturated.
How does the rate of dissolution and crystallization compare at equilibrium?
At equilibrium, the rate of dissolution is equal to the rate of crystallization. This means that the amount of solute dissolving is the same as the amount of solute precipitating out of solution, leading to a dynamic equilibrium where there is no net change in the concentration of the solution.
If a solution contains a large amount of glucose what color will the Benedict's reagent become?
If a solution contains a large amount of glucose, the Benedict's reagent will change color to a bright orange or brick red after being heated. This color change indicates the presence of reducing sugars, such as glucose, through a reduction reaction. The intensity of the color can vary based on the concentration of glucose present in the solution.
What happens if phenolphthalein solution is added in hydrochloric acid?
If phenolphthalein solution is added to hydrochloric acid, it will remain colorless since the pH of hydrochloric acid is too low for phenolphthalein to change color. Phenolphthalein typically turns pink in a basic solution but does not show a color change in acidic conditions.
What colour does universal indicator change to Hydrochloric acid is added?
Universal indicator changes to red/orange when hydrochloric acid is added, indicating that the solution is acidic.
Is Sodium sulfate plus hydrochloric acid a physical change?
If you add an aqueous solution of sodium sulfate (Na2SO4) to an aqueous solution of hydrochloric acid (HCl), there is NO REACTION. So, yes, it is a physical change because you made solutions of the two reagents, but for no other reason.
What is hydrochloric acid and acid in a aqueous solution?
Hydrochloric acid (HCl) is a strong acid commonly used in various industrial and laboratory processes. When HCl is dissolved in water, it forms a solution known as hydrochloric acid solution. In this solution, HCl dissociates into hydrogen ions (H+) and chloride ions (Cl-) in water, making it acidic in nature.
What happen when hydrochloric acid in litmuspaper?
When hydrochloric acid comes into contact with litmus paper, the paper will turn red. This color change indicates that the solution is acidic with a low pH. Litmus paper is a pH indicator that changes color based on the acidity or basicity of the solution it is exposed to.
How much hydrochloric acid in grams can be neutralized by 3.20 of sodium bicarbonate?
To find this answer, you can use a rearranged empirical formula but you need to know how strong the hydrochloric acid is as this will greatly change the amount needed
What is the reaction of hydrochloric acid and phenolphthalein?
Hydrochloric acid (HCl) is a strong acid that will react with phenolphthalein, a pH indicator, causing it to turn colorless in acidic conditions. This reaction occurs due to the change in pH of the solution, which shifts the equilibrium of the phenolphthalein molecule leading to its color change.
Phenolphthalein change color when mixed with hydrochloric acid?
Phenolphthalein is a pH indicator that changes color in response to a change in pH. When mixed with hydrochloric acid (a strong acid), phenolphthalein will turn colorless due to the decrease in pH, indicating an acidic solution.
What is the reactions of hydrochloric acid to methyl orange?
Hydrochloric acid is an acid, so it reacts with methyl orange, which is a pH indicator. When added to hydrochloric acid, methyl orange turns red due to the low pH of the acid. This color change indicates the presence of an acidic solution.
Is a concentrated solution always a saturated solution?
No, a concentrated solution need not be saturated always.Concentrated simply implies the presence of a particular solute in a solution in high percentile.Saturation implies that the addition of even a very small amount of a solute will result in a change of phase.Concentrated solution is a solution that contains a large amount of solute relative to the amount that could dissolve.
How do you calculate the buffering capacity of a solution?
The buffering capacity of a solution is calculated by determining the amount of acid or base that can be added to the solution before the pH changes significantly. This is typically done by measuring the initial pH of the solution, adding a small amount of acid or base, and then measuring the change in pH. The buffering capacity is then calculated as the amount of acid or base added divided by the change in pH.
Doubling the amount of a nonvolatile solute in a solution?
A. doubles the elevation change of the boiling point
