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Which pair of terms best describes the type of change that occurred in the reaction hydrogen plus oxygen leads to water plus energy?
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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?
Iodide ions are preferred to react with acidified hydrogen peroxide due to their lower reduction potential compared to other halides. This causes iodide to be oxidized to elemental iodine, creating a visible color change that indicates the reaction has occurred. Other halides have higher reduction potentials and are less likely to undergo this reaction with hydrogen peroxide.
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.
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.
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.
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 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.
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.
Why do you think no reaction occurs between acidified hydrogen peroxide and halide ions other than iodide?
Iodide ions are preferred to react with acidified hydrogen peroxide due to their lower reduction potential compared to other halides. This causes iodide to be oxidized to elemental iodine, creating a visible color change that indicates the reaction has occurred. Other halides have higher reduction potentials and are less likely to undergo this reaction with hydrogen peroxide.
What kind of change happens when hydrogen gas and oxygen gas react burn and form water?
This reaction is a chemical change.
How we know a chemical change has occurred when burning a candle?
Burning is a chemical reaction, an oxydation.
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
Which describes a change that occurred in Rome about 100 B.C.?
Patricians were becoming wealthier and plebeians were becoming poorer.
