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After 180.0 g of zinc was dropped into a beaker of hydrochloric acid and the reaction ceased, 27.6 g of unreacted zinc remained in the beaker: Zn + HCl → ZnCl2 + H2 (c) How many more grams of HCl would be required to completely react with the original sample of zinc?

After 180.0 g of zinc was dropped into a beaker of hydrochloric acid and the reaction ceased, 27.6 g of unreacted zinc remained in the beaker: Zn + HCl → ZnCl2 + H2 (c) How many more grams of HCl would be required to completely react with the original sample of zinc?

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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After 180.0 g of zinc was dropped into a beaker of hydrochloric acid and the reaction ceased, 27.6 g of unreacted zinc remained in the beaker:

Zn + HCl → ZnCl2 + H2

(c) How many more grams of HCl would be required to completely react with the original sample of zinc?
 
 

 

**Educational Website Transcription and Explanation** --- **Question (a): How many grams of hydrogen gas were produced?** - **Answer:** 4.66 g H₂ This question asks for the amount of hydrogen gas produced in a reaction. The student entered "4.66" grams, which is shown in a text box with the unit "g H₂" labeled beside it. **Feedback:** - The response is not explicitly shown as correct or incorrect, but is likely assumed to be correct based on context. --- **Question (b): How many grams of HCl were reacted?** - **Answer:** 169.76 g HCl This question refers to the amount of hydrochloric acid that was consumed in the reaction. The student entered "169.76" grams in the provided text box. **Feedback:** - This response is marked as "Correct" with a checkmark in a green box, indicating the student's calculation or data entry was accurate. **Assistance:** Assistance Used --- **Question (c): How many more grams of HCl would be required to completely react with the original sample of zinc?** - **Answer:** 201.22 g (Attempted Answer) The student is asked to determine how much additional hydrochloric acid is needed to complete the reaction with the remaining zinc. **Feedback:** - The answer provided is shown as "Incorrect" with an ‘X’ in a red box. - The feedback given is: "Incorrect. Did you use the remaining amount of Zn and not the amount reacted?" This suggests an error in considering the zinc amount involved in the reaction. **Hint:** - There is a hint icon indicating that additional guidance or information was available but not shown in this image snapshot. --- This exercise involves balancing chemical reactions and stoichiometric calculations, emphasizing precision in measurement and calculation in chemistry labs.
Transcribed Image Text:**Educational Website Transcription and Explanation** --- **Question (a): How many grams of hydrogen gas were produced?** - **Answer:** 4.66 g H₂ This question asks for the amount of hydrogen gas produced in a reaction. The student entered "4.66" grams, which is shown in a text box with the unit "g H₂" labeled beside it. **Feedback:** - The response is not explicitly shown as correct or incorrect, but is likely assumed to be correct based on context. --- **Question (b): How many grams of HCl were reacted?** - **Answer:** 169.76 g HCl This question refers to the amount of hydrochloric acid that was consumed in the reaction. The student entered "169.76" grams in the provided text box. **Feedback:** - This response is marked as "Correct" with a checkmark in a green box, indicating the student's calculation or data entry was accurate. **Assistance:** Assistance Used --- **Question (c): How many more grams of HCl would be required to completely react with the original sample of zinc?** - **Answer:** 201.22 g (Attempted Answer) The student is asked to determine how much additional hydrochloric acid is needed to complete the reaction with the remaining zinc. **Feedback:** - The answer provided is shown as "Incorrect" with an ‘X’ in a red box. - The feedback given is: "Incorrect. Did you use the remaining amount of Zn and not the amount reacted?" This suggests an error in considering the zinc amount involved in the reaction. **Hint:** - There is a hint icon indicating that additional guidance or information was available but not shown in this image snapshot. --- This exercise involves balancing chemical reactions and stoichiometric calculations, emphasizing precision in measurement and calculation in chemistry labs.
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