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How do you calculate the change in pH in a chemical reaction?
To calculate the change in pH in a chemical reaction, you can use the Henderson-Hasselbalch equation. This equation relates the pH of a solution to the concentration of the acid and its conjugate base. By knowing the initial concentrations of the acid and base, as well as the equilibrium concentrations after the reaction, you can calculate the change in pH.
Could the change in the pH paper itself be a reaction Support your answer?
The substances contained in the pH paper react with the substance to be tested; and this is a chemical reaction.
Why is a indicator's reaction in acids and bases a chemical change?
When an indicator is added to an acid or base, it undergoes a chemical reaction with the hydrogen or hydroxide ions present in the solution. This reaction causes a change in the color of the indicator, indicating a shift in the pH of the solution. Since a new substance with different properties is formed during this reaction, it is considered a chemical change.
Is an indicator's reaction in acids and bases a chemical change?
No, an indicator's reaction in acids and bases is a physical change. Indicators change color based on the pH of the solution they are in, but the chemical composition of the indicator remains the same.
What is the indication that chemical reaction occurs between sodium hydroxide and acetic acid?
A change in the pH.
Why........Give a everyday example of a chemical reaction Describe the signs that a reaction has taken place?
* digestion is a chemical reaction.* Signs of chemical reactions may be: - Gas release - Formation of a precipitate - Change of color - Change of odor - Change of pH - Change of aspect - Change of viscosity - Change of the temperature - Visible formation of new compounds - Change of the state of the matter - A violent reaction with explosion or fire - Bubbling - Emitting a sound - Emitting a light
Is pH a physical or chemical?
pH is not a change at all. It is a chemical condition.
Is there a chemical or physical change in a pH test?
It is a chemical change.
How can a chemical reaction be observed?
Some indications may be: - release of a gas - formation of a precipitate - change of color - change of odor - change of pH - change of viscosity - change of the aspect - etc.
Is mixing acid with base a chemical or physical change?
Adding a base to an acid or vice versa in changing the chemical properties of that solution. In both cases you are neuralizing the solution. There might be a physical change as well, but it would depend on what chemicals where mixing. But this reaction will definitely have a chemical change.
Is anti- acid tablets in water a chemical reaction or physical change?
When an antacid tablet dissolves in water, it is a chemical reaction. The tablet reacts with the water to neutralize excess stomach acid, which changes the chemical composition of both the tablet and the water.
What is the only sure sign of a chemical change?
Chemical change would cause change in physical quality or thermal value, the most observable quality is colour. It may observed a colour change of reaction but not all reaction had observable change of colour. In that case it will need to add indicator to observe a chemical change. Type of indicator may be different base on the concerned reaction. Indicator chosen may be the type that change colour due to pH or the type that react with contents of product to change colour.
