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Describe a solution that contains a buffer?
Acetic acid is added to the solution, but the pH of the solution does not change. Sodium hydroxide, a base, is added to the solution, but the pH of the solution does not change.
Why the color of benedicts solution change when heated?
The color change in Benedict's solution when heated is due to the reduction of copper ions in the solution. Initially, the blue-colored Cu(II) ions in Benedict's solution are reduced to form a reddish-brown precipitate of Cu(I) oxide. This color change indicates the presence of reducing sugars in the solution.
Is a precipitate a phsical change?
Yes, a precipitate is a physical change. It occurs when two solutions react to form a solid that settles out of the solution. This is a reversible change as the solid can be redissolved back into the solution.
What is pH 7.0 an acid base or neutral solution?
Anything with a pH of 7 is neutral
Is it important for the concentration of the reactant solutions to be equal?
Yes. The volume you have of a particular solution does not have anything to do with the concentration of that solution.
Does a solution have a chemical change?
A solution does not have a chemical change, but it does have a physical change in state.
Is cloudy tea a solution in chemistry?
Anything that's "cloudy" is not a solution.
What will litmus paper do to a solution with Na Cl?
Litmus paper doesn't "do anything" to a solution. Litmus paper has some dyes on it, so some of the dyes might leak into the solution though. NaCl won't do anything to Litmus paper either. Salt, when dissolved in water, maintains a neutral solution. Litmus paper only changes color when there is a pH change. So, nothing really will happen.
Is this a chemical change or physical change silver nitrate solution is added to another solution producing a white solid?
it is a chemical change
Describe a solution that contains a buffer?
Acetic acid is added to the solution, but the pH of the solution does not change. Sodium hydroxide, a base, is added to the solution, but the pH of the solution does not change.
How do you calculate the enthalpy change of a solution (H solution)?
To calculate the enthalpy change of a solution (H solution), you can use the formula: H solution H solute H solvent H mixing Where: H solute is the enthalpy change when the solute dissolves in the solvent H solvent is the enthalpy change when the solvent changes state (if applicable) H mixing is the enthalpy change when the solute and solvent mix By adding these three components together, you can determine the overall enthalpy change of the solution.
Was the time required to change the solution different for the two beakers?
Yes, the time required to change the solution was different for the two beakers. Beaker A took longer to change the solution compared to Beaker B.
Is a solution a physical or chemical change?
A solution is not a change; a solution is represented by a solute dissolved in a solvent; but dissolving (without chemical reaction) is a physical process.
An example of an isotonic solution?
Normal Saline Solution, or anything that contains 0.9% NaCl
How does concentration change after every spoon full of salt is added after the solution is saturated?
The concentration of the salt solution does NOT change- it is saturated.
Is creating a solution a physical change or a chemical change?
Dissolving is a physical change.
What substance do not change their identy?
it is a solution
