0
What else can I help you with?
Is adding HCl to Mg physical change?
No, adding hydrochloric acid (HCl) to magnesium (Mg) and observing the resulting chemical reaction is a chemical change, not a physical change. The reaction produces hydrogen gas and magnesium chloride, with new substances formed.
Which would increases the reaction rate?
Temperature
What is a negative reaction for Benedict's?
A negative reaction for Benedict's test would be no color change or a very faint color change after adding the Benedict's reagent to a sample containing reducing sugars. This would indicate that there is a low concentration or absence of reducing sugars in the sample.
Would the enthalpy change be different if solid sodium hydroxide pellets were added to hydrochloric acid instead of adding hydrochloric acid to sodium hydroxide solution?
Yes, the reaction involving the solid is actually an individual step in the equation of the reaction between the solutions. If you were to add the change in enthalpy of the reaction with the solid NaOh to the change in enthalpy of the other step in the reaction (that's adding water and the NaOh pellets) you would find the sum equivalent to the change in enthalpy of the reaction involving the two solutions (this is supported by Hess's law). I suggest that you consider Hess's law for more information.
Is adding phenolphthalein to sodium hydroxide a chemical change?
No, adding phenolphthalein to sodium hydroxide is a physical change because it only involves mixing two substances together. A chemical change would involve a new substance being formed through a chemical reaction, which does not occur in this case.
Is adding sugar to cereal a physical or chemical change?
Adding sugar to cereal is a physical change because the sugar does not undergo a chemical reaction when mixed with the cereal. The sugar retains its chemical structure and properties, only altering the taste of the cereal.
Is cornflour and water a physical change?
Adding cornflour to water is a physical change. The reason this process is classified as such is that it does not change the chemical identities of the substances involved, which is the criterion for a process to be considered a chemical reaction. Technically, the cornflour would slowly hydrolyze in water, which would be a chemical reaction.
Would adding an electron to hydrogen change its mass?
no, it would change its charge not its mass.
Is mixing acid with a base a chemical 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.
What would happen if the equilibrium of a weak acid dissociation reaction upset?
The reaction would shift to balance the change
What would happen if equilibrium of a weak acid dissociation reaction were upset?
The reaction would shift to balance the change
Would happen if the equilibrium of a weak acid dissociation reaction were upset?
The reaction would shift to balance the change
