NSSCO Chemistry (6117) case studies
NSSCO Chemistry (6117) · Put your knowledge to work in context.
NSSCO Chemistry (subject code 6117) is the ordinary-level chemistry qualification taken in Namibia's senior secondary school system. It is aimed at learners in Grades 11 and 12 who need a formal science credit before moving on to AS-level study, vocational training or tertiary courses such as nursing, agriculture, pharmacy support, mining and metallurgy, environmental health and teaching. The NSSCO Chemistry (6117) case studies are 5 cases and about 3,372 words.
1Recovering Four Components from a 15.0 g Mixture
Each candidate in a Grade 11 practical assessment receives a sealed, dry 15.0 g sample containing iron filings, sand, ammonium chloride and sodium chloride. The label gives no masses.
777 words, about 4 min2Copper(II) Sulfate Crystals: Yield and Purity Decisions
A candidate prepares hydrated copper(II) sulfate crystals from copper(II) carbonate and dilute sulfuric acid. 6.20 g of dry copper(II) carbonate powder is added in small portions to 40.0 cm³ of 2.00 mol/dm³ sulfuric acid, stirred until no more solid dissolves, and the mixture is filtered.
608 words, about 3 min3Comparing Rates of Reaction by Mass Loss
A student follows the rate of reaction between calcium carbonate and dilute hydrochloric acid by standing the reaction flask on a balance and recording the loss in mass every 10 s. Each run uses 50.0 cm³ of acid and 2.00 g of calcium carbonate; the acid is in excess in every case.
685 words, about 3 min4Identifying Four Unlabelled Solids from Property Data
A technician has four unlabelled white or shiny solids and a list of tests carried out on each. A: melting point 801 °C; does not conduct when solid, conducts when molten; dissolves in water and the solution conducts.
632 words, about 3 min5Ethanol from Sucrose: Is the Fermentation Finished?
A school project makes ethanol from sucrose. 500 g of sucrose is dissolved in 2.0 dm³ of water, yeast is added, and the mixture is kept at 30 °C in a sealed 5 dm³ vessel fitted with a tube leading into limewater.
670 words, about 3 min