Answered: 4. What is the difference between…

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter3: Chemical Reactions

Section: Chapter Questions

Problem 121QRT: Ammonia can be formed by a direct reaction of nitrogen and hydrogen. N2(g) + 3 H2(g) 2 NH3(g) A...

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4. What is the difference between actual yield and theoretical yield?

A) Actual yield has to do only with the reactants of a reaction, and theoretical yield has to do only with the products of a reaction.

B) Actual yield is how much is actually produced in a reaction (it has to be given or measured), and theoretical yield is a calculation that has to be done.

C) Actual yield is how much the reaction produces, and theoretical yield is how much a reaction consumes.

D) Actual yield has to do with how much you can actually get out of a reaction, and theoretical yield is how much you can get out of a reaction if you have maximum starting materials.

5. 200.0 mL of a 0.900 M solution of KCl is diluted to 600.0 mL. What is the new concentration of the solution?

6. A student combined 37.2 mL of 1.69 M KMnO₄ solution with 15.70 mL of a 0.891 M KMnO₄ solution. Calculate the concentration of the final solution.

7. How many moles of CH₃OH are there in 150.0 mL of 0.495 M CH₃OH?

8. What is the concentration of lithium ions in 0.110 M Li₂HPO₄?

9. How many mL of 0.200 M KBr would be required to make a 0.0625 M solution of KBr when diluted to 175.0 mL with water?

10. If 28.7 g of C₂H₅OH (MM = 46.07 g/mol) are added to a 500.0 mL volumetric flask, and water is added to fill the flask, what is the concentration of C₂H₅OH in the resulting solution?

11. To what volume (in mL) would you need to dilute 25.0 mL of a 1.45 M solution of KCl to make a 0.0375 M solution of KCl?

12. Consider the reaction: Ag⁺(aq) + Cl⁻(aq) → AgCl(s) How many grams of NaCl would be needed to precipitate the Ag⁺ ions from 2.500 × 10² mL of a 0.0115 M AgNO₃ solution? The molar mass of NaCl is 58.44 g/mol.

13. How many moles of precipitate will be formed when 45.3 mL of 0.450 M AgNO₃ is reacted with excess MgCl₂ in the following chemical reaction? 2 AgNO₃(aq) + MgCl₂(aq) → 2 AgCl(s) + Mg(NO₃)₂(aq)

14. If 16.5 g of NaOH is added to 0.550 L of 1.00 M Ni(NO₃)₂, how many grams of Ni(OH)₂ will be formed in the following precipitation reaction? 2 NaOH(aq) + Ni(NO₃)₂(aq) → Ni(OH)₂ (s) + 2 NaNO₃ (aq)

15. What mass of aluminum (in g) would be required to completely react with 1.95 L of 0.450 M HBr in the following chemical reaction? 2 Al(s) + 6 HBr(aq) → 2 AlBr₃ (aq) + 3 H₂(g)

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