Question

How would the following errors affect the final mass of copper in this experiment? (a) Small...

How would the following errors affect the final mass of copper in this experiment? (a) Small amounts of water remained in the beaker after in the beaker after washing with acetone and drying your sample for a week. (b)While a small amount of solid is lost with the decanted liquid. Copper metal recovered would be less than expected as some amount of Cu(OH)2 is still unconverted.

Science   Chemistry   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

a) When there is a small amount of water present in the beaker after washing with acetone it will apparantly increase the mass of copper and we will get a wrong result with positive error.

b) In case of small amount of solid is lost the mass of copper will be less than the ideal result and similarly if some of the copper is not converted into copper hydroxide due to insufficient reagent the mass of copper will be less than ideal value and we will get a wrong result with negative error.

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
How would the following errors affect the calculated values of the molar mass (high, low, or...
How would the following errors affect the calculated values of the molar mass (high, low, or no effect), if you were not aware that they had occured? Explain your answers. a. A small amount of unknown adheres to the inside of test tube and did not get dissolved in the cyclohexane. b. Some solvent is lost by volitilization. c. The thermometer used in this experiment was miscalibrated to read 0.5 C lower than the actual temperature over its entire scale.
How would the following observations affect the calculated % of composition of each component? there is...
How would the following observations affect the calculated % of composition of each component? there is a small amount of white powder left in the sample container after you heated the contents to the beaker
Reaction 1. a) For each mole of Cu dissolved in the nitric acid solution (HNO3), how...
Reaction 1. a) For each mole of Cu dissolved in the nitric acid solution (HNO3), how many moles of [Cu(H2O)6]2+ are formed? b) Given your data above, how many moles of [Cu(H2O)6]2+ were formed in your reaction? Reaction I: Cu (s) + 4 H3O+(aq) + 2 NO3-(aq) --> [Cu(H2O)6]2+(aq) + 2 NO2(g) The first reaction in the series is an oxidation – reduction reaction where copper metal“dissolves” in nitric acid (HNO3). Anoxidation – reduction reactionoccurs when one atomgains an electron...
Procedure Reaction 1: Dissolving the Copper 1. Obtain a clean, dry, glass centrifuge tube. 2. Place...
Procedure Reaction 1: Dissolving the Copper 1. Obtain a clean, dry, glass centrifuge tube. 2. Place a piece of copper wire in a weighing paper, determine the mass of the wire and place it in the centrifuge tube. The copper wire should weigh less than 0.0200 grams. 3. In a fume hood, add seven drops of concentrated nitric acid to the reaction tube so that the copper metal dissolves completely. Describe your observations in the lab report. (Caution, Concentrated nitric...
Explain how each of the following errors Part B would affect the calculation of the molar...
Explain how each of the following errors Part B would affect the calculation of the molar mass of the unknown. (which would have been Cyclohexane ,C6H12, molar mass=84.2, boiling point=80.7) (4): 0.3703g (6): Temp of vapor in flask 102C 375.15K (7): Barometric Pressure- 30.35in * 2.54cm/1in * 10mm/1cm= 770.89 --> 1.01 atm (8): Volume of Erlenmeyer flask- 147 mL 0.147 L M= (step4)(0.0821L atm/mole)(6) / (step 7)(step 8) = 76.8 g/mol <---that should have been 84.2 if we would have...
a)How is it possible to determine if CaCO3 is Cl- free after synthesis? b)How can the...
a)How is it possible to determine if CaCO3 is Cl- free after synthesis? b)How can the Cl- ions be remove from CaCO3 after synthesis? I should answer the questions from the following experiment but if you know the answer and you are sure, yo do not need to read experiment. Please answer correctly because i hav no chance to make wrong :(((( Physical and Chemical Properties of Pure Substances Objective The aim of today’s experiment is to learn handling chemicals...
Questions are after the procedures. Procedure 1) For Trial 1, use a graduated cylinder to measure...
Questions are after the procedures. Procedure 1) For Trial 1, use a graduated cylinder to measure 5 mL of 1 M sodium sulfate (Na2SO4). Place the sodium sulfate in a beaker. Using a clean graduated cylinder, add 5 mL of 1 M calcium chloride (CaCl2) to the beaker. Stir to mix well. 2) Using two Büchner funnels as in the diagram below, set up a funnel system with a safety flask to protect the water system from contaminants. 3) Filter...
Please answer the following Case analysis questions 1-How is New Balance performing compared to its primary...
Please answer the following Case analysis questions 1-How is New Balance performing compared to its primary rivals? How will the acquisition of Reebok by Adidas impact the structure of the athletic shoe industry? Is this likely to be favorable or unfavorable for New Balance? 2- What issues does New Balance management need to address? 3-What recommendations would you make to New Balance Management? What does New Balance need to do to continue to be successful? Should management continue to invest...
What tools could AA leaders have used to increase their awareness of internal and external issues?...
What tools could AA leaders have used to increase their awareness of internal and external issues? ???ALASKA AIRLINES: NAVIGATING CHANGE In the autumn of 2007, Alaska Airlines executives adjourned at the end of a long and stressful day in the midst of a multi-day strategic planning session. Most headed outside to relax, unwind and enjoy a bonfire on the shore of Semiahmoo Spit, outside the meeting venue in Blaine, a seaport town in northwest Washington state. Meanwhile, several members of...
Sign In INNOVATION Deep Change: How Operational Innovation Can Transform Your Company by Michael Hammer From...
Sign In INNOVATION Deep Change: How Operational Innovation Can Transform Your Company by Michael Hammer From the April 2004 Issue Save Share 8.95 In 1991, Progressive Insurance, an automobile insurer based in Mayfield Village, Ohio, had approximately $1.3 billion in sales. By 2002, that figure had grown to $9.5 billion. What fashionable strategies did Progressive employ to achieve sevenfold growth in just over a decade? Was it positioned in a high-growth industry? Hardly. Auto insurance is a mature, 100-year-old industry...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT