1.When 247.0 g of copper II carbonate was heated 149.2 g of copper II oxide was produced. The equation for the reaction is: CuCO3 CuO CO2. a Calculatethemaximum mass of copper II oxide that can be made from 247 g of copper II carbonate. b Calculate thepercentage yield of copper II oxide
Question 200 cm 3 of air was passed over heated copper in a syringe several times to produce copper II oxide. When cooled the final volume of air recorded was 158cm 3.Estimate the percentage of oxygen in the air Options A 31 B 27 C 21 D 19
Calculate the percentage yield of sodium chloride in this experiment. 2 .. Jasmine reacted an oxide of copper with carbon. copper oxide carbon copper carbon dioxide She reacted 5.0 g of copper oxide. In her reaction 2.8 g of copper was formed.
metals of a relatively low isolation potential have been settling along with copper or it may result from partial oxidation of copper. Calculations and report 1. Calculate the percentage content of copper on the basis of the hode mass increase: Cu .
2/8/2013 0183 324.1 If Total Copper has been determined and Residual Copper analysis is not required proceed to Step 5.0 to calculate the residual copper concentration otherwise proceed to step 4.2. 4.2 Wash the filter residue from the cyanide soluble procedure into a
The percentage by weight of any atom or group of atoms in a compound can be computed by dividing the total weight of the atom or group of atoms in the formula by the formula weight and multiplying by 100. Finding molar mass starts with units of grams per mole g/mol .
2016/9/26 0183 323 Calculate how many milliliters of 6M Hydrochloric acid were actually required to react with your sample of copper oxide show your calculation . approximately what percentage excess did you use. 4 Calculate the observed empirical formula of your copper oxide i.e. the formula based exactly on your experimental results.
10 The following experiment was used to determine the percentage of copper II oxide in a mixture C containing copper and copper II oxide. A sample of C was added to a previously weighed beaker which was then reweighed. mass of beaker C 32.65 g a
copper sulfur vapor copper sulfide By using a predetermined amount of copper and determining the mass of copper sulfide produced it is possible to calculate the percentage by mass of each element in the compound .
Chemical Reactions of Copper and Percent Yield lab experiment 4. If .80 g of CuO are present then .01 moles of CuO are present. Thus .01 moles of H 2 SO 4 are necessary to react with CuO. If 3.0 M H 2 SO 4 is available then .01 2473.0 L or 3.3 mL of 3.0 M H 2 SO 4 are necessary to react.
11/10/2016 0183 32Hydrogen was passed over heated 2g copper oxide till only copper was left. The mass of copper obtained was was 1.6 grams. What is the percentage of oxygen in copper oxide There is a loss of 0.4 grams. 2.0 1.6 0.4 grams 0.4/2.0 xx 100 20 The
1. Calculate the percentage by mass of hydrogen in water. 2. Calculate the percentage by mass of copper in copper II oxide. 3. Calculate the percentage by mass of iron in Iron III oxide. 4. Calculate the percentage composition of carbon dioxide.
I disagree wid u Fyzkid.. D answer is actually A. U can solve it by. 1. Calculating d molar mass of Copper 1 oxide.. 2. Calculating the mass of copper. 3. Dividing the mass of copper by the total molar mass and den multiply by 100. Like 1 Dislike 0 Reply Quote Follow.
83. One of the reactions used in the smelting of copper ores to produce copper and sulfur dioxide involves reacting copper I oxide with copper I sulfide. When 250 kg of copper I oxide is heated with 125 kg of copper I sulfide 285 kg of copper is recovered. 2
See Page 1. Finding the mass percentage of oxygen in copper oxide: Mass of oxygen .336 177 .001g Mass of copper oxide 2.000 177 .001g Mass percentage of oxygen in the copper oxide .336 177 .001g 247 2.000 177 .001g X 100 16.8 177 .1 Finding the moles of oxygen: Mass of
If you want students to calculate the percentage yield they need to weigh the glass tube at the start with the copper oxide in it and at the end with the copper. If there appears to be a greater than 100 yield this is probably due to there still being copper oxide present alongside the copper.
Report Thread starter 3 years ago. 8. something in my calculation has gone wrong and my percentage is over 100. i did 247/mr of copper oxide 80. 247/80 3.0875. then i substituted it into the formula and did actual yield which was 149.2/3.0875 100 4832. help.
The mass of copper oxide used and the mass of copper made was measured each time. The results are shown in the table. Experiment 12 3 Mass of copper oxide used in g 4.0 4.0 4.0 Mass of copper made in g 3.3 3.5 3.2 2 c i Calculate the mean mass of
Given the following data calculate the mass percentage of copper in the unknown copper oxide sample for this particular trial. 5 pts Mass of empty test tube: 2.319 g Mass of test tube and unknown copper oxide sample: 2.943 g Mass of test tube and product after reaction : 2.630 g 294392.3199 0.6249 copper oxide xiool whole 1 Part.
Thus the percentage of copper in copper oxide derived from all the three experiments is nearly the same. Hence the above data illustrate the law of constant composition. ILLUSTRATIVE EXAMPLE 6 : 5.06 g of pure cupric oxide CuO on complete reduction by heating in a current of hydrogen gave 4.04 g of metallic copper. 1.3 g of pure metallic copper was completely dissolved in nitric acid and
Calculate the percentage atom economy for Reaction 2. 3 marks Percentage atom economy 5.5 The atom economy for Reaction 1 is 68.45 . Compare the atom economies of the two reactions for making copper chloride. Give a reason for
of copper oxide CuO . Relative atomic masses A r : O 16 Cu 64 .. Calculate the percentage of copper in copper oxide. .. Save My Exams The Home of Revision For more awesome GCSE and A level resources visit us at www.savemyexams.co
Calculate the percentage by mass of nitrogen in ammonia NH3 . Relative atomic masses A : H 1 N 14 You must show how you work out your answer. 3 marks Copper reacts with oxygen to form copper oxide. 0 2CuO Calculate the maximum mass of
Calculate the percentage of Copper in Copper oxide CuO Mr80 . 3 marks Ar of Cu 64 1 mark Percentage of copper in CuO 64/80 x100 1 Mark Percentage of copper in CuO 80 1 mark Answered by Katie D. Chemistry tutor.
14/6/2021 0183 32Copper II oxide reacts with sulfuric acid to make copper II sulfate and water. In an experiment 1.6 g of dry copper sulfate crystals are made. If the theoretical yield is 2.0 g calculate the
2021. 3. 10. 0183 324b. Other percentage mass composition calculations including of any component in a compound or a mixture. Atomic masses used for 4b. questions: C 12 Cl 35.5 Fe 56 H 1 Mg 24 N 14 Na 23 O 16 S 32 By now I assume you can do formula mass calculations and read formula without any trouble so ALL the detail of such calculations is NOT shown just the bare
2. Calculate your percentage yield of copper II oxide using the equation below: yield X mass of copper II oxide recovered 100 theoretical mass of copper II oxide 3. a. Give at least I reason why the percent yield might be high. b. Give at least I reason why the
In order to solve this problem we have to calculate the ratio or proportion of copper and oxygen in the two samples of copper oxide compound. Now : a In the first experiment: Mass of copper 1.03g. AndMass of copper oxide 1.288 g. SoMass of oxygen Mass of copper oxideMass of copper
Would your calculated mass percent of copper in copper oxide be greater than less than or equal to the true mass percentage of copper in copper oxide Explain. Based on the correct empirical formulae for copper I and copper II oxide demonstrate the Law of Multiple Proportions. 4. 5.
4.0 A student made some copper sulfate crystals CuSO4. The student used 7.95g of copper oxide and 100 cm3 of a 2.00 mol/dm3 solution of sulfuric acid. The equation for the reaction is: CuO H2SO4 CuSO4 H2O 4.1 Calculate the number of moles of copper oxide in 7.95 g copper oxide. Relative atomic masses Ar: O 16 Cu 63.5 2 marks
Copper oxide CuO is a semiconducting compound with a monoclinic structure. CuO has attracted particular attention because it is the simplest member of the family of copper compounds and exhibits a range of potentially useful physical properties such as high temperature superconductivity electron correlation effects and spin dynamics 6162 .
4.1 Calculate the number of moles of copper oxide in 7.95 g copper oxide. Relative atomic masses Ar: O 16 Cu 63.5 2 marks Answer moles 4.2 Calculate the number of moles of sulfuric acid in 100 cm3 of 2.00 mol/dm3 sulfuric acid.
Problems where you will be given the percentage composition and asked to calculate the formula. Another example is reducing copper oxide to copper. Dont get left behind Join thousands of learners improving their science marks online with Siyavula Practice.
2014/12/7 0183 32One of the reactions involved in the smelting of copper sulfide ores involves copper I oxide and copper I sulfide: 2Cu2O2 Cu2S gt 6Cu SO2 Assuming that 35.00 g of copper I oxide is heated with 25.00 g of copper I sulfide A determine which reagent is present in excess B calculate the theoretical yield of copper C determine the percentage yield if 35.46 g of copper is actually
2014/12/7 0183 32One of the reactions involved in the smelting of copper sulfide ores involves copper I oxide and copper I sulfide: 2Cu2O solid Cu2S solid gt 6Cu solid SO2 gas Assuming that 35.00 g of copper I oxide is heated with 25.00 g of copper I sulfide. a Determine which reagent is present in excess b Calculate the theoretical yield of copper c Determine the percentage yield if 35.46
Calculate the of copper in copper sulphate CuSO 4 Relative atomic masses: Cu 64 S 32 and O 16 relative formula mass 64 32 4x16 160 only one copper atom of relative atomic mass 64 Cu 100 x 64 / 160 40 copper by mass in the
2. 1 6 grams of Cu on reaction with H N O 3 followed by ignition of the nitrate gave 2. 7 g of copper oxide. In another experiment 1. 1 5 g of copper oxide upon reaction with hydrogen gave 0. 9 2 g of copper. This data illustrate the law of:
From your results calculate the copper content of your brass expressing your answer as a percentage. Guide to calculations. Calculate the number of moles of copper in 10 cm 3 the volume of the brass solution . Multiply the value you obtained in 1 by the relative atomic mass of copper 63.5 to give the mass of copper in the brass solution.
Percentage Composition composition gives the percentage of each element in a compound by mass. For instance Consider the formula copper II oxide CuO. The molar mass of the compound is 63.55 g/mol 16.00 g/mol 79.55 g/mol If I have one mole of the
2016/3/26 0183 32Explanation: 63.55 g mol1 63.55 32.06 4 21515.999 g mol1 215100 . Note that the anhydrous salt is white but it dissolves in water to give a beautiful blue solution due to the Cu OH 2 6 2 complex. Answer link.
Percentage of copper 2 iii Calculate the mass of copper that could be made from 4.0 g of copper oxide. Mass of copper g 1 c The experiment was done three times. The mass of copper oxide used and the mass of copper made was measured each time. The results are shown in the table.
Copper: The copper bits are heated. The syringes are pressed down constantlyso the air passes through the copper. The oxygen will react with the copper to form copper oxide. This is repeated until the volume of air stops decreasing. Calculate the volume of air left. This should be about 78 as the 21 Oxygen was used up.
EquipmentHealth Safety and Technical NotesProcedureTeaching NotesApparatus1. Eye protection 2. Reduction tube hard glass test tube with small hole near closed end 3. 1hole bung with glass tube to fit the reduction tube 4. Rubber tubing 5. Clamp stand boss and clamp 6. Bunsen burner 7. Heat resistant mat 8. Spatula 9. Balance must be accurate to at least 0.01 g Chemicals1. Copper II oxide HARMFUL DANGEROUS FOR THE ENVIRONMENT 2 spatulas 2. Methane natural gas EXTREMELY FLAMMABLE edu.rsc.org
2012. 9. 3. 0183 32Chemical Reactions of Copper and Percent Yield KEY Prelab Review Questions 1. Give an example other than the ones listed in this experiment of redox and metathesis reactions. Redox: Zn MgCl 2 ZnCl 2 Mg Zinc is oxidized: 0Zn Zn2 2e Magnesium is reduced: Mg2 2e Mg0 Metathesis: Pb NO
100 g of copper oxide contained 1.46/1.83100 79.78 Thus the percentage of copper in copper oxide derived from all the three experiments is nearly the same. Hence the above data illustrate the law of constant composition.4