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How would litmus paper change its colorin calcium hydroxide solution?
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∙ 11y ago
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which of the following best describes a solution that contains a buffer?
sodium hydroxide, a base, is added to the solution, but the pH of the solution does not change.
Is calcium in water a physical or chemical change?
Adding calcium to water results in a chemical change because the calcium and the water that react are combined to form a distinct new substance, calcium hydroxide, that did not exist in either the calcium or the water before their reaction.
When a drop of universal indicator is dropped into calcium hydroxide what colour change will you observe?
With a pH of 12 it is very alkaline and would turn universal indicator dark blue.
5 examples of bases?
Sodium hydroxide (NaOH) or caustic soda Calcium hydroxide ( Ca(OH)2 ) or limewater Ammonium hydroxide (NH4OH) or ammonia water Magnesium hydroxide ( Mg(OH)2 ) or milk of magnesia Many bleaches, soaps, toothpastes and cleaning agents
Sodium hydroxide dissolve in water is physical change?
Yes, dissolving sodium hydroxide in water is a physical change.
Reason why calcium hydroxide is used to detect carbon iv oxide while potassium hydroxide solution is not?
Both hydroxides will react with carbon dioxide to form their respective carbonates. Calcium carbonate is largely insoluble in water and so it will form a visible solid precipitate. Potassium carbonate is soluble in water, so there will be no visible change to the solution.
Describe a solution that contains a buffer?
Acetic acid is added to the solution, but the pH of the solution does not change. Sodium hydroxide, a base, is added to the solution, but the pH of the solution does not change.
What is slake lime?
Quicklime is calcium oxide - CaO and slaked lime is calcium hydroxide - Ca(OH)2. CaCO3--------------CaO + CO2 This reaction occur at high temperature; mixing calcium oxide with water, the hydroxide is obtained.
What effects does calcium hydroxide has on red and blue litmus paper?
calcium hydroxide turn red litmus paper into blue because it is a base. it does not have any effect on blue litmus paper.
which of the following best describes a solution that contains a buffer?
sodium hydroxide, a base, is added to the solution, but the pH of the solution does not change.
Is calcium in water a physical or chemical change?
Adding calcium to water results in a chemical change because the calcium and the water that react are combined to form a distinct new substance, calcium hydroxide, that did not exist in either the calcium or the water before their reaction.
How could you show that dissolving calcium in water results in a chemical change?
After the calcium dissolves add an indicator (such as litmus, methyl red or methyl orange) and observe the color, all of them imply that the solution is alkaline. As the pH value changes, a chemical reaction should be occurred. The alkaline substance is aqueous calcium hydroxide.
What gas do we exhale that can be tested for using limewater?
Carbon Dioxide will change limewater (calcium hydroxide) into calcium carbonate. This shows as a white precipitation (milky).
What is the name given to a change which the calcium chloride crystal has undergone?
Ethalphy Change of Solution
When calcium oxide changing to calcium hydroxide is a chemical?
Anytime you have a reaction that changes the state of the matter, such as the change from calcium oxide to calcium hydroxide, it is a chemical reaction. Ex. CaO+H2 reacts to form CaOH you then must balance the charges by putting a 2 in front of CaO and CaOH 2CaOH + H2 reacts to form 2CaOH
Why is sodium hydroxide dissolving in water is a physical change?
Because the molecule of NaOH can be recovered unchanged from the solution.
When a drop of universal indicator is dropped into calcium hydroxide what colour change will you observe?
With a pH of 12 it is very alkaline and would turn universal indicator dark blue.
