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Which pair of tearms best describes the type of change that occurred in the reaction?
The terms "exothermic" and "oxidation" best describe the type of change that occurred in the reaction. "Exothermic" denotes heat being released during the reaction, while "oxidation" refers to the loss of electrons by a substance.
Is reaction of hydrogen chloride gas and water a physical change or chemical change?
The reaction of hydrogen chloride gas and water is a chemical change because new substances are formed, specifically hydrochloric acid. Chemical bonds are broken and formed during the reaction.
Why do you think no reaction occurs between acidified hydrogen peroxide and halide ions other than iodide?
No reaction occurs between the acidified hydrogen peroxide and the other halide ions, because the hydrogen ions involved in both cases are in the same group. For a reaction to occur it needed to have an element that is more reactive than hydrogen.
What are the four occurrences indicate a chemical reaction has occurred?
A chemical reaction can result in any or all of the following: - a change in temperature (up or down) - a change in color - a smell that wasn't there before - the formation of bubbles (indicating the production of a gas) - the formation of a precipitate
How can you be sure that at least one chemical change has occurred?
You can be sure that a chemical change has occurred if there is a change in color, formation of a precipitate, evolution of gas, or absorption/release of heat during the reaction. These are all indicative of a chemical reaction where the substances are transformed into different compounds with new chemical properties.
What is the ratio of hydrogen atoms before the reaction to after the reaction?
1:1 The number of atoms does not change in a reaction.
Which pair of tearms best describes the type of change that occurred in the reaction?
The terms "exothermic" and "oxidation" best describe the type of change that occurred in the reaction. "Exothermic" denotes heat being released during the reaction, while "oxidation" refers to the loss of electrons by a substance.
Is burning hydrogen a chemical property?
Burning hydrogen is a chemical change rather than a chemical property. A chemical change involves the formation of new substances with different chemical compositions, as in the reaction between hydrogen and oxygen to form water. A chemical property, on the other hand, describes how a substance can undergo a chemical change.
How does a chemical equation show that a chemical reaction has occurred?
A chemical equation shows that chemical reaction has occurred as new substances have been formed from the reagents. A chemical equation has two sides before reaction and after reaction, if there is any change from the before reaction side to the after reaction side, it indicates that a chemical reaction has just occurred.
Is reaction of hydrogen chloride gas and water a physical change or chemical change?
The reaction of hydrogen chloride gas and water is a chemical change because new substances are formed, specifically hydrochloric acid. Chemical bonds are broken and formed during the reaction.
How does the boiling point of a hydrocarbon change in presence of hydrogen?
It can NOT be changed by the presence of hydrogen without chemical reaction.
What Describes a double replacement reaction?
In a double replacement reaction a change of bonds between reactants occur.
What kind of change happens when hydrogen gas and oxygen gas react burn and form water?
This reaction is a chemical change.
Why do you think no reaction occurs between acidified hydrogen peroxide and halide ions other than iodide?
No reaction occurs between the acidified hydrogen peroxide and the other halide ions, because the hydrogen ions involved in both cases are in the same group. For a reaction to occur it needed to have an element that is more reactive than hydrogen.
How we know a chemical change has occurred when burning a candle?
Burning is a chemical reaction, an oxydation.
Which describes a change that occurred in Rome about 100 B.C.?
Patricians were becoming wealthier and plebeians were becoming poorer.
Why does hydrogen peroxide bubbled?
Hydrogen Peroxide H2O2 is chemically unstable, and exposure to a catalyst will cause it to convert into Oxygen Gas and Water. The bubbles are Oxygen Gas. The equation that describes this change is 2H2O2 ---> O2 + 2H2O Even light, heat or age can trigger this decomposition reaction.
