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production of a gas
formation of a precipitate
change in color
transfer of energy (heat and/or light)
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What are 5 key words in a chemical change?
These are: reaction, chemical formula, reactant, product, chemical equation.
What are the characteristics of a chemical reaction with example?
5characteristics of chemical reaction 1, evolution of gas 2,formation of precipitate 3,change in temperature 4,change in colour 5,change in state
What is the change when you add zinc to about 5 ml of hydrochloric acid?
The chemical reaction is:Zn + 2 HCl = ZnCl2 + H2
Describe the factors which affect chemical reaction rates?
The factors that change the reaction rates of chemical reactions are: 1)temperature 2)concentration 3)pressure 4)physical state 5)a catalyst
What are 5 example of chemical reaction that occur in nature?
ashley haimescombustion(forest fire) rusting of iron nitrogen fixation corrosion of copper
What are 5 key words in a chemical change?
These are: reaction, chemical formula, reactant, product, chemical equation.
What is the name of the chemical law on which promblems 4 5 are based?
Law of Chemical Reaction and Law of Chemical equilibrium
What are 5 ways to control a chemical reaction?
1) Raising the temperature. 2) Increasing the concentration (in solution). 3) Increasing the pressure (in gases). 4) Increasing the surface area of a solid. 5) Use a catalyst.
What is the chemical reaction for this equation C3H8 plus 5 O2 3 CO2 plus 4 H20 plus energy?
This is the chemical reaction for burning of propane.
One of 5 things have to happen for a chemical reaction to take place?
the requiredactivation energy is the basic factor for a reaction to start.
What are the characteristics of a chemical reaction with example?
5characteristics of chemical reaction 1, evolution of gas 2,formation of precipitate 3,change in temperature 4,change in colour 5,change in state
What is the chemical equation for the burning of propane if all the products and reactants are in the gas phase?
The chemical reaction is:C3H8 + 5 O2 = # CO2 + 4 H2O
What are the 5 important factors that influence the rate of a chemical reaction?
Temperature Surface area/phase of reactants Concentration of reactants Presence of catalyst Activation energy of reaction
What is the word equation for propane when burning?
The chemical reaction is: C3H8 + 5 O2 = 3 CO2 + 4 H2O
What is the change when you add zinc to about 5 ml of hydrochloric acid?
The chemical reaction is:Zn + 2 HCl = ZnCl2 + H2
Describe the factors which affect chemical reaction rates?
The factors that change the reaction rates of chemical reactions are: 1)temperature 2)concentration 3)pressure 4)physical state 5)a catalyst
What speeds up a chemical reaction?
A catalyst (e.g) MnO2 and Hydrogen Peroxide Concentration (e.g) 5 Molar HCL with react faster than 0.1m Temperature (Magnesium + cold water no reaction)
