Chemistry: An Atoms-Focused Approach
14th Edition
ISBN: 9780393912340
Author: Thomas R. Gilbert, Rein V. Kirss, Natalie Foster
Publisher: W. W. Norton & Company
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Chapter 16, Problem 16.70QA
Interpretation Introduction
To explain:
A color change that happens when copper sulphate reacts with a strong base and then ammonia.
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When a strong base is added to a solution of CuSO4, which is pale blue, a precipitate forms and the
solution above the precipitate is colorless. What is the net chemical equation that describes this reaction?
Include the phases of all species in the chemical equation.
When ammonia is then added, the precipitate dissolves and the solution turns a deep navy blue. What is the
net chemical equation that describes this event? Include the phases of all species in the chemical equation.
Cu(OH)₂(s) + 4NH₂(aq) → [Cu(NH₂)]²+ (aq) + 2OH¯(aq)
Tip: Plus signs (+) can be typed from the keyboard. Reaction arrows can be found in the Tools
menu of the answer module. Include phases in the balanced chemical equation. Click on the
(aq) button in the tools to select the phase to add. Phases should not be subscripted.
Scott prepares a solution which contains a large excess of iron and a small amount of thiocyanate. He notices a faint orange color appear in the solution once mixed. He repeats this process with a higher concentration of thiocyanate and notices a deepening of the orange color in the solution once mixed. Explain what has happened to the equilibrium in this case. Has the value of Keq changed? Explain.
Determine the percentage of CaO (56.08 g/mol) in the
sample.
Consider 0.4960 g of CaCO3 (100.09 g/mol) is dissolved
in an acidic solution. The calcium is precipitated as
CaC₂04 (110.12 g/mol) and the dry precipitate is found to
24
weigh 0.6186 g.
a) 63.51%
b) 31.50 %
c) 71.87%
d) 31.76 %
Chapter 16 Solutions
Chemistry: An Atoms-Focused Approach
Ch. 16 - Prob. 16.2VPCh. 16 - Prob. 16.3VPCh. 16 - Prob. 16.4VPCh. 16 - Prob. 16.5VPCh. 16 - Prob. 16.6VPCh. 16 - Prob. 16.7VPCh. 16 - Prob. 16.8VPCh. 16 - Prob. 16.9VPCh. 16 - Prob. 16.10VPCh. 16 - Prob. 16.11QA
Ch. 16 - Prob. 16.12QACh. 16 - Prob. 16.13QACh. 16 - Prob. 16.14QACh. 16 - Prob. 16.16QACh. 16 - Prob. 16.17QACh. 16 - Prob. 16.18QACh. 16 - Prob. 16.19QACh. 16 - Prob. 16.20QACh. 16 - Prob. 16.21QACh. 16 - Prob. 16.22QACh. 16 - Prob. 16.23QACh. 16 - Prob. 16.24QACh. 16 - Prob. 16.25QACh. 16 - Prob. 16.26QACh. 16 - Prob. 16.27QACh. 16 - Prob. 16.28QACh. 16 - Prob. 16.29QACh. 16 - Prob. 16.30QACh. 16 - Prob. 16.31QACh. 16 - Prob. 16.32QACh. 16 - Prob. 16.33QACh. 16 - Prob. 16.34QACh. 16 - Prob. 16.35QACh. 16 - Prob. 16.36QACh. 16 - Prob. 16.37QACh. 16 - Prob. 16.38QACh. 16 - Prob. 16.39QACh. 16 - Prob. 16.40QACh. 16 - Prob. 16.41QACh. 16 - Prob. 16.42QACh. 16 - Prob. 16.43QACh. 16 - Prob. 16.44QACh. 16 - Prob. 16.45QACh. 16 - Prob. 16.46QACh. 16 - Prob. 16.47QACh. 16 - Prob. 16.48QACh. 16 - Prob. 16.49QACh. 16 - Prob. 16.50QACh. 16 - Prob. 16.51QACh. 16 - Prob. 16.52QACh. 16 - Prob. 16.53QACh. 16 - Prob. 16.54QACh. 16 - Prob. 16.55QACh. 16 - Prob. 16.56QACh. 16 - Prob. 16.57QACh. 16 - Prob. 16.58QACh. 16 - Prob. 16.59QACh. 16 - Prob. 16.60QACh. 16 - Prob. 16.61QACh. 16 - Prob. 16.62QACh. 16 - Prob. 16.63QACh. 16 - Prob. 16.64QACh. 16 - Prob. 16.65QACh. 16 - Prob. 16.66QACh. 16 - Prob. 16.67QACh. 16 - Prob. 16.68QACh. 16 - Prob. 16.69QACh. 16 - Prob. 16.70QACh. 16 - Prob. 16.71QACh. 16 - Prob. 16.72QACh. 16 - Prob. 16.73QACh. 16 - Prob. 16.74QACh. 16 - Prob. 16.75QACh. 16 - Prob. 16.76QACh. 16 - Prob. 16.77QACh. 16 - Prob. 16.78QACh. 16 - Prob. 16.79QACh. 16 - Prob. 16.80QACh. 16 - Prob. 16.81QACh. 16 - Prob. 16.82QACh. 16 - Prob. 16.83QACh. 16 - Prob. 16.84QACh. 16 - Prob. 16.85QACh. 16 - Prob. 16.86QACh. 16 - Prob. 16.87QACh. 16 - Prob. 16.88QACh. 16 - Prob. 16.89QACh. 16 - Prob. 16.90QACh. 16 - Prob. 16.91QACh. 16 - Prob. 16.92QACh. 16 - Prob. 16.93QACh. 16 - Prob. 16.94QACh. 16 - Prob. 16.95QACh. 16 - Prob. 16.96QACh. 16 - Prob. 16.97QACh. 16 - Prob. 16.98QACh. 16 - Prob. 16.99QA
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- When you add HCl to a solution containing aqueous sodium acetylsalicylate (structure shown below), a precipitate formed. Which is the structure of this precipitate?arrow_forwardConsider a pale blue solution of CuSO4. Include phases in the balanced chemical equations. When a strong base is added to the pale blue solution of CuSO4, a precipitate forms and the solution above the precipitate is colorless(1) What is the net ionic equation that describes this irreversbile reaction? Ammonia is then added to the above heterogenous mixture. The precipitate dissolves, and then the entire solution turns a deep navy blue. However adding OH- to the deep navy blue solution results in the precipiate reforming.(2) What is the net ionic equation that describes this reversible event?arrow_forwardConsider the insoluble compound silver chloride, AgCl. The silver ion also forms a complex with cyanide ions. Write a net ionic equation to show why the solubility of AgCl(s) increases in the presence of cyanide and calculate the equilibrium constant for this reaction. Solubility product constant data is found in the Chemistry References. For Ag(CN)₂, Kf = 1.3×1021. Be sure to specify states such as (aq) or (s). K = + +arrow_forward
- Consider the insoluble compound silver bromide, AgBr. The silver ion also forms a complex with cyanide ions. Write a net ionic equation to show why the solubility of AgBr(s) increases in the presence of cyanide and calculate the equilibrium constant for this reaction. Solubility product constant data is found in the Chemistry References. For Ag(CN)₂, Kf = 1.3×1021. Be sure to specify states such as (aq) or (s). K= + +arrow_forwardApproximately 1 mL of two clear, colorless solutions, 0.1 M Mn(NO3)2 and 0.1 M NaOH, were combined. Upon mixing, a brown precipitate formed. After centrifugation, the solution above the precipitate was found to be clear and colorless. Based on the these observations, determine if a reaction occurred. If so, write the balanced chemical equation.arrow_forwardAn equilibrium reaction between chromate ions, CrO4 2- (yellow), and H+ ions is established to produce dichromate, Cr₂072- (orange). Note the colours. A student adds NaOH to a test tube containing an orange mixture of the above reagents. What is observed? 01. The solution turns from orange to yellow O 2.A precipitate forms 3. The solution tuimns from orange to colourless O4. The solution remains orangearrow_forward
- Barium fluoride has increased solubility in acidic solution. Why?arrow_forward9. [CoCl4]? (suda) + 6H2O (s) [Co(H2O)6]?* (suda) + 4Cl (suda) + isi blue ping The reaction given above is in equilibrium at constant temperature and the following steps are applied. Balance Answer the following questions taking into account the reaction. a) When distilled water is added to the balance, in which direction does the balance move and what will be the resulting color? b) When a salt containing chloride ions is added to the equilibrium, in which direction does the equilibrium move and what color will be formed? c) When the reaction at equilibrium is heated, in which direction does the equilibrium move and what color will be formed?arrow_forwardExplain why the solubility of AgBr decreases when NaBr is added to the system.arrow_forward
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