1 / 6

Percentage Yield (again)

Percentage Yield (again). Simple PERCENTAGE YIELD calculation. FM: 100 56 44. LIMESTONE (calcium carbonate) is used to make QUICKLIME (calcium oxide) for cement making. RAM Ca 40 O 16 C 12. CaCO 3 = CaO + CO 2.

kitra
Download Presentation

Percentage Yield (again)

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Percentage Yield (again)

  2. Simple PERCENTAGE YIELD calculation FM: 10056 44 LIMESTONE (calcium carbonate) is used to make QUICKLIME (calcium oxide) for cement making RAM Ca 40 O 16 C 12 CaCO3 = CaO + CO2 So, THEORETICALLY, 100 tonnes of limestone should produce 56 tonnes of quicklime. BUT the ACTUAL YIELD is only 48 tonnes So..the PERCENTAGE YIELD is only 48 x 100 = 87.5% 56 Why? – next slide

  3. Very few chemical reactions have a yield of 100% because: • The raw materials (eg limestone) may not be pure • Some of the products may be left behind in the apparatus • The reaction may not have completely finished • Some reactants may give some unexpected products Careful planning and design of the equipment and reaction conditions can help keep % yield high

  4. Apply your knowledge: RAM Mg 24 Fe 56 C 12 O 16 2Mg + O2→2MgO RFM: 48 32 80 The chemical reaction above produced 70g of Magnesium Oxide

  5. Trickier……. Fe2O3 + 3CO →2Fe + 3CO2 160 84 112 132 320g of iron oxide made 200g of Iron. What is the percentage yield in this reaction?

  6. Apply your knowledge: RAM Mg 24 Fe 56 C 12 O 16 2Mg + O2→2MgO RFM: 144g of Magnesium produced 170g of Magnesium Oxide. What is the percentage yield of this reaction?

More Related