Preparation
• Grate a small red cabbage. If you do not want to grate the entire cabbage, grating half of a cabbage should be enough. Put the fine, pulpy grated cabbage into a large bowl or pot.
• Boil a pot of water. Use caution when handling the boiling water. Pour the boiling water into the bowl with the cabbage pulp until the water just covers the cabbage.
• Leave the cabbage mixture steeping, stirring occasionally, until the liquid is room temperature. This should take at least half an hour. The liquid will become red or purplish-red in color.
• Place a strainer over another large bowl or pot and pour the cabbage mixture through the strainer to remove the cabbage pulp. Press down on the pulp in the strainer, such as by using a large spoon, to squeeze more liquid out of the pulp.
• In the bowl, you should now have only liquid that will either be purple or blue in color. This will be your indicator solution, which you will use to test the pH of different liquids.
<span>• Children should wear goggles or other protective eyewear and adults should supervise and use caution when handling bleach and vinegar, because they can irritate eyes and skin.</span>
The quantity of electricity : 2 Faraday = 193000 Coulomb
<h3>Further explanation</h3>
Given
2 moles of electrons
Required
The quantity of electricity
Solution
According to Faraday, the amount of current flowing in the electrolysis cell is closely related to the amount of substance that reacts
1 Faraday is the amount of electricity that is passed in the electrolysis cell to obtain 1 mole of electrons. 1 mole of electrons is equivalent to an electric charge of 96500 Coulombs.
The conversion / relationship can be stated as follows:
1 Faraday = 1 mole of electrons = 96500 Coulombs
1 faraday = coulomb / 96500
Can be formulated
Coulomb = Q = I. t so:
so for 2 moles electrons :
= 2 x 96500 C
= 193000 C
= 2 Faraday
Answer:
Techniques and Tests
Qualitative analysis typically measures changes in color, melting point, odor, reactivity, radioactivity, boiling point, bubble production, and precipitation.
Answer:
The rabbit prey population will decrease.
Explanation:
More predators are there to eat the prey
If the system is cooled, more of the products will be formed as the equilibrium shifts to the right.
Explanation:
The reaction is an endothermic reaction which absorbs heat from the environment. This is why we see energy on the reactant side.
This reaction is in equilibrium when energy is absorbed in this manner.
According to Le Chatelier's principle "if any of the conditions of a system in equilibrium is changed, the system will adjust itself in order to annul the effect of the change".
- A change in temperature of an equilibrium system shifts the system to a new equilibrium point.
- The backward reaction is favored by an increase in temperature because heat is absorbed in that step.
- This will eventually lead to the production of more of the product.
- Cooling the system will decrease the temperature and will favor the forward reaction.
- If the system is cooled, more of the products will be formed as the equilibrium shifts to the right.
- More NO gas will be produced in the process.
learn more:
Chemical equilibrium brainly.com/question/5877801
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