(c) A student uses this apparatus to find the mass of magnesium oxide that forms when a known mass of magnesium is heated. magnesium ribbon crucible lid heatThis is his method.• find the mass of the crucible and lid• place some magnesium ribbon in the crucible• find the mass of the crucible, lid and magnesium• heat the crucible with the lid on for a few minutes• find the mass of the crucible, lid and magnesium oxideUsing this method, the mass of magnesium oxide formed is less than expected.Explain two changes that the student should make to his method to obtain a mass of magnesium oxide closer to the expected mass. (4) 1 ................................................................................................................................................................................................................................................................................ .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... 2 ................................................................................................................................................................................................................................................................................ .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... ....................................................................................................................................................................................................................................................................................
Question
(c) A student uses this apparatus to find the mass of magnesium oxide that forms when a known mass of magnesium is heated. magnesium ribbon crucible lid heatThis is his method.• find the mass of the crucible and lid• place some magnesium ribbon in the crucible• find the mass of the crucible, lid and magnesium• heat the crucible with the lid on for a few minutes• find the mass of the crucible, lid and magnesium oxideUsing this method, the mass of magnesium oxide formed is less than expected.Explain two changes that the student should make to his method to obtain a mass of magnesium oxide closer to the expected mass. (4) 1 ................................................................................................................................................................................................................................................................................ .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... 2 ................................................................................................................................................................................................................................................................................ .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... ....................................................................................................................................................................................................................................................................................
Solution
-
Ensure Complete Reaction: The student should ensure that the magnesium ribbon is completely reacted to form magnesium oxide. This can be done by heating the crucible for a longer period of time. If the reaction is not complete, the mass of magnesium oxide formed will be less than expected.
-
Prevent Loss of Product: The student should make sure that no magnesium oxide is lost during the experiment. This can be done by ensuring the lid is always on the crucible, except when weighing, to prevent the escape of magnesium oxide in the form of smoke or dust. Also, handling the crucible carefully to avoid spilling will help in preventing the loss of product.
Similar Questions
12 g of magnesium ribbon was heated in a crucible. At the end of the reaction 20 g of magnesium oxide had been produced. What mass of oxygen had reacted with the magnesium?
The student added excess copper oxide. Describe the steps that the student could include in the method to find the mass of copper oxide that reacted.
The teacher used 1.00 g of magnesium.Use the equation to calculate the maximum mass of magnesium oxide produced.Page 5Give your answer to three significant figures.Relative atomic masses (A r): O = 16; Mg = 24
Write the chemical formula and calculate the formula unit mass of the following compoundsa) Magnesium Nitrate b) Calcium hydroxide c) Aluminum oxide
A student wants to design a simple investigation to prove that mass is conserved during a chemical reaction.Which of the following investigations will provide evidence the student needs to prove the claim that mass is always conserved in a chemical reaction?A Compare the mass of a candle before and after burning it.B Compare the mass of a piece of paper before and after tearing it.C Compare the mass of a piece of copper before and after melting it.D Compare the mass of a cup of water with a sealed lid and an Alka-Seltzer tab before and after adding the Alka-Seltzer tablet to the water.
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.