Exothermic Reactions
What are Exothermic reactions
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Exothermic reactions are chemical processes that release energy, typically as heat, into the surroundings.
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The equation of potassium with water is
potassium + water --> potassium hydroxide + hydrogen
When magnesium reacts with hydrochloric acid, the products are magnesium chloride (a salt) and hydrogen gas.
Combustion is the process of burning, a rapid chemical reaction between a fuel and an oxidant (usually oxygen) that releases energy as heat and light.
when you put magnesium in dilute hydrochloric acid the test tube gets hot because it is an exothermic reactions.
Potassium hydroxide has the chemical formula KOH, meaning there is only one hydrogen atom present in the compound, not an "extra" one.
The chemical formula for magnesium chloride is (MgCl_{2}\).
Magnesium ribbon is a thin, reactive strip of magnesium metal used in science experiments and other applications.
When hydrochloric acid is poured into a test tube and measured the temperature. Then adding identical pieces of magnesium ribbon. After the reaction stopped measure the temperature
start temperature is 18/* C
end temperature is 42/*C
You know a chemical reaction is finished when there are no more observable changes like color change or bubbling, the amount of precipitate stops forming, or the total mass remains constant.
In chemistry, an indicator is a substance that changes color to signal a chemical change.
Phenolphthalein is a chemical compound used as a pH indicator in acid-base titrations.
Titration is a laboratory method used to determine the unknown concentration of a solution.