Question

Please someone I need help with chemistry ! If you can’t do them all that is fine please just do what you can and help . Please !

11. 2H202 (1) - 2H20 (1) + 02(g)
Drake asked Theo why the decomposition of hydrogen peroxide, H202, loses mass, especially when there are more molecules on the product side. Theo explains that it is because they decomposed the product. He says that decomposing the product destroys the original substance. To further prove his point, he explains that in nature, decomposition occurs when dead organic matter is destroyed by fungi: without this, the world would be littered with dead things. What, if anything, is wrong with this conversation of what happened in the reaction? Justify your answer.




13. Lab Analysis: You forgot to label your chemicals and do not know whether your unknown solution is strontium nitrate or magnesium nitrate. You use the solutions potassium carbonate and potassium sulfate in order to determine your mistake. unknown + potassium carbonate & unknown + potassium sulfate . What do you observe when the unknown solution is mixed with potassium sulfate? (Can you see the shape underneath?)

14. Lab Analysis: You forgot to label your chemicals and do not know whether your unknown solution is strontium nitrate or magnesium nitrate. You use the solutions potassium carbonate and potassium sulfate in order to determine your mistake. unknown + potassium carbonate & unknown + potassium sulfate . Write the complete balanced molecular equation(s) below of the reaction(s) that occurred, including the states of matter. HINT: Try writing ALL possible reactions that could have been created, and then decide which reactions actually occurred.

15. Lab Analysis: You forgot to label your chemicals and do not know whether your unknown solution is strontium nitrate or magnesium nitrate. You use the solutions potassium carbonate and potassium sulfate in order to determine your mistake unknown + potassium carbonate & unknown + potassium sulfate . From your observations, what is your unknown solution? A - magnesium nitrate or B - strontium nitrate

16. Lab Analysis: You forgot to label your chemicals and do not know whether your unknown solution is strontium nitrate or magnesium nitrate. You use the solutions potassium carbonate and potassium sulfate in order to determine your mistake. unknown + potassium carbonate & unknown + potassium sulfate . Justify your unknown solution in complete sentences, using your observations and the solubility rules as evidence in your explanation.

Answer 1

12. Firstly, it is not the product that is decomposed, but rather the reactant (hydrogen peroxide) that decomposes into water and oxygen gas.

Secondly, while it is true that the decomposition of organic matter by fungi is a form of decomposition, it is not a relevant analogy for the chemical reaction of hydrogen peroxide. Organic matter decomposition is a biological process that involves the breakdown of complex organic molecules into simpler ones, while the decomposition of hydrogen peroxide is a chemical reaction that involves the breaking of a single molecule into two simpler molecules.

Lastly, there is no mass lost during the decomposition of hydrogen peroxide. The total mass of the reactants (hydrogen peroxide) is equal to the total mass of the products (water and oxygen gas). The apparent loss of mass may be due to the release of oxygen gas as a product, which can escape into the atmosphere and make it appear as if the mass has decreased.

13. When the unknown solution is mixed with potassium sulfate, no visible reaction occurs. It is not possible to determine the identity of the unknown solution from this observation alone.

14. Possible balanced molecular equations for the reactions that could have occurred are:

Unknown + potassium carbonate → potassium nitrate + magnesium or strontium carbonate

Unknown + potassium sulfate → potassium nitrate + magnesium or strontium sulfate

Only one of these reactions will actually occur, depending on the identity of the unknown solution.

15. Based on the observations, it is not possible to determine the identity of the unknown solution. Further tests or observations would be needed to make a determination.

16. The identity of the unknown solution can be justified based on the solubility rules. (Soluble = S, Not Soluble = aq) Potassium sulfate is soluble in water, while both magnesium and strontium sulfates are insoluble. If the unknown solution is magnesium nitrate, then when mixed with potassium sulfate, magnesium sulfate would be formed and would precipitate out of solution as a solid. However, if the unknown solution is strontium nitrate, then when mixed with potassium sulfate, no reaction would occur since strontium sulfate is also insoluble and would remain in solution. Therefore, based on the lack of visible reaction between the unknown solution and potassium sulfate, the unknown solution is likely strontium nitrate.