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Some indicators of a chemical reaction are:
- change of color
- change of odor
- release of a gas
- change of the temperature
- change of the viscosity
- formation of a precipitate
- change of general appearance
- possible explosion - possible chemiluminescence - formation of new compounds
What else can I help you with?
What 4 factors determine a chemical change?
heating is one of them
What is the most important question to ask determine whether a change is a physical or chemical change?
did the composition change
How do you determine a chemical change has occurred when two substances are combined?
A chemical change can be determined when two substances are combined by observing if there is a color change, formation of a precipitate, evolution of gas, or change in temperature. Additionally, if the chemical properties of the substances change, such as their reactivity or toxicity, it indicates a chemical reaction has taken place.
How can one determine the change in enthalpy (H) for a chemical reaction?
One can determine the change in enthalpy (H) for a chemical reaction by measuring the heat released or absorbed during the reaction using a calorimeter. The difference in heat between the products and reactants gives the enthalpy change.
When matter changes state what is a chemical property?
A chemical property is a characteristic of matter that describes its ability to undergo a chemical change or reaction. These properties determine how a substance will react with other substances and can only be observed during a chemical change, not a physical change like a change in state.
How would you determine if a chemical change had occurred?
Some characteristics of a chemical change are: - change of smell - change of color - release of gases - change of temperature - formation of a precipitate - change of the aspect - change of pH in solutions - change of viscosity - flames or explosion etc.
What are 3 things to look for to determine if a chemical change was produced in the experiment?
change in temperature, formation of a gas, formation of a solid
What are the factors which determine a chemical change?
Factors that determine a chemical change include the types of substances involved, the presence of a catalyst, temperature, pressure, and concentration of reactants. Additionally, the activation energy required for the reaction to occur also plays a significant role in determining whether a chemical change will take place.
How would you determine if a chemical change has occurred?
You can determine if a chemical change has occurred by looking for signs such as a change in color, formation of a precipitate, evolution of gas, or release of heat or light. Additionally, if the chemical composition of the substance has been altered, it is likely that a chemical change has taken place.
What happens to chemical bonds during chemical change?
During a chemical change, chemical bonds are broken between atoms in the reactants and new bonds are formed to create products. Energy is either released or absorbed during bond breaking and forming processes. The types and strengths of the bonds determine the overall energy change of the chemical reaction.
Is titration a chemical change?
No, titration is a physical process used to determine the concentration of a substance in a solution. It involves adding a reagent to the solution until a specific chemical endpoint is reached. The substances involved in titration do not undergo a chemical change during the process.
How can one determine the enthalpy change in a chemical reaction?
One can determine the enthalpy change in a chemical reaction by measuring the heat released or absorbed during the reaction using a calorimeter. The enthalpy change is calculated using the formula: H q / n, where H is the enthalpy change, q is the heat exchanged, and n is the number of moles of the substance involved in the reaction.
