Ms. Allison was predicting the products for a double replacement reaction. She was given for the reactants. Here is what she did.

Na2S + HCl → HNa + SCl

What did she do wrong and what are the correct products?

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burgundysheep393Lv1

2 Jun 2021

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The following are actual student responses to the question: Why is it necessary to balance chemical equations?

The chemicals will not react until you have added the correct ratios.
The correct products will not form unless the right amounts of reactants have been added.
A certain number of products cannot form without a certain number of reactants.
The balanced equation tells you how much reactant you need, and allows you to predict how much product you will make.
A ratio must be established for the reaction to occur as written.

Justify the best choice, and, for choices you did not pick, explain what is wrong with them.

coralplatypus464

You are to read through Scenarios A and B. Figure out which one that the researcher did incorrectly. After choosing that one, you are to write out what they did incorrectly and why.
Then, explain what the scientist should do to make the experiment correct.

Your answer must be in complete sentences and use proper sentence structure. Use proper grammar and spelling in your responses. You must include the correct balanced equation for both scenarios and any calculations for determining your answer. Write as much as you can showing all balancing equations and calculations and be accurate on the topic since this is worth 9 points.

Scenario A
- Wilma was given the task to produce of aluminum oxide, . She had one tank of oxygen gas, and of solid aluminum, . She knew that if she heated the aluminum in the presence of the oxygen gas, she could produce the aluminum oxide. Since she had such little amount of aluminum, she decided to use as little of aluminum as she could to produce the of aluminum oxide. She measured out of aluminum and heated it with excess oxygen. Assume Wilma’s reaction went . Wilma was very happy that her reaction produced the .
Scenario B
- Fred was given the task to produce of aluminum bromide, . He had a tank of bromine gas, , and of solid aluminum, . He knew that if he heated the aluminum in the presence of excess bromine gas, he could produce the aluminum bromide. Since he had such little amount of aluminum, he decided to use as little of aluminum as he could to produce the 63 grams of aluminum bromide. He measured out of aluminum and heated it with excess bromine gas. Assume Fred’s reaction went . Fred was very happy his reaction produced the .