How do you know if a new substance is formed in a chemical equation
1 answer:
<u>Answer:</u> The indicators written will identify a new substance is formed in a chemical equation.
<u>Explanation:</u>
A chemical equation is defined as the equation in which reactants and products are present and are separated by a right arrow.
Indicators of a chemical reaction are:
- Formation of a precipitate
- Evolution of gas
- Formation of bubbles
- Color change
- Specific odor
- Change in temperature
Hence, the indicators written will identify a new substance is formed in a chemical equation.
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An Arrhenius base is a molecule that when dissolved in water will break down to yield an or hydroxide ion in solution.
An Arrhenius base is a compound that increases the ion concentration in aqueous solution.
An Arrhenius base is a substance that, when dissolved in an aqueous solution, increases the concentration of hydroxide, or , ions in the solution.
Bases Properties
Arrhenius bases that are soluble in water can conduct electricity.
Bases often have a bitter taste and are found in foods less frequently than acids. Many bases, like soaps, are slippery to the touch.
Bases also change the colour of indicators. Red litmus turns blue in the presence of a base (see figure below), while phenolphthalein turns pink.
Some bases react with metals to produce hydrogen gas.
Acids (pH < 7.0) react with bases (pH > 7.0) to produce a salt and water. When equal moles of an acid and a base are combined, the acid is neutralized by the base. The resulting mixture will have a more neutral pH.
An Arrhenius acid is a substance that dissociates in water to form hydrogen ions or protons. In other words, it increases the number of ions in the water. In contrast, an Arrhenius base dissociates in water to form hydroxide ions
.
Example, sodium hydroxide, is added to an aqueous solution. NaOH dissociates into sodium, , and hydroxide,
ions.
Learn more about the Arrhenius bases here:
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