applied science- unit 19 A part 1 - finding the copper content - distinction level
25 keer bekeken 0 keer verkocht
Vak
Unit 19 - Practical Chemical Analysis
Instelling
PEARSON (PEARSON)
this is unit 19 A part 1 . it is distinction level graded by my teacher .
this will cover :
Practical 1: determine the copper content in brass.
Part 1: make the brass solution.
Part 2: make a series dilution of copper nitrate and then ran all samples through the colorimeter.
i have been asked to create an educational presentation and accompanying tutorial notes in support
of the charity "Educate Africa" that my school sponsors. The intended audience is sixth-form
students who attend a school in a small African town without any laboratory facilities for them to
conduct their own practical’s. By contrasting "primary and secondary" titrimetric standards and
analysing potential sources of error, i will create a presentation or video and accompanying tutorial
booklet that shows how to precisely determine an analyte's composition and concentration in a
matrix.
What investigation will I be doing
Practical 1: determine the copper content in brass.
Part 1: make the brass solution.
Part 2: make a series dilution of copper nitrate and then ran all samples through the colorimeter.
Practical 2: determine the iron content of an iron tablet.
Part 1: standardisation of potassium permanganate with sodium oxalate solution.
Part 2: determine the concentration of iron by titrating potassium permanganate solution against an
unknown conc of iron sulphate made from iron sulphate tablets and sulfuric acid.
Practical 3: determine the bicarbonate content of water.
Part1: standardise hydrochloric acid with sodium carbonate.
Part 2: dilute hydrochloric acid.
Part 3: titrate diluted HCl against bottled water using a pH meter to determine the bicarbonate
content of water.
, Investigation 1: Determine the copper content of brass.
Aim :
In order to determine the unknown proportion of copper within a known quantity of brass, this
practical must be completed. This experiment uses colorimetry to determine a sample's absorption.
The colorimeter measures the absorption of brass and nitric acid solution in my practical.
Background :
A metal alloy called brass is primarily made of copper and zinc. Depending on the application, it
might also contain minuscule amounts of other metals like nickel, lead, and tin. Brass has been used
for many years and is highly valued for its tenacity, adaptability, and distinctive golden appearance.
It is frequently used in the production of many different products, such as musical instruments,
plumbing fixtures, decorative items, and ammunition casings. Brass can be customized for particular
applications by changing the ratios of copper and zinc in the alloy, which affects its physical
properties. Additionally, brass is salt water and corrosion resistant. In this experiment, nitric acid and
brass are reacted.
A beaker, A colorimeter, a stopwatch, A stirring stick, Purified water, Brass fillings ,Nitric acid ,Water
bath, Measuring cylinder, 10 cm3 volumetric flask,10 ml graduated pipette, plastic pasteur pipettes,
Hot plate, Electronic balance 3dp
Healthy and safety
Lab coat to be worn with safety glasses
hazard warning and safety sign to be read before any work
Bags or coat must be kept under bench or completely out of the way
Spills or accident must be told to a teacher. Rinse skin instantly if any chemical touches
Broken glass must be cautiously place in the yellow glass bin provide
Don protective eyewear and gloves that can withstand chemicals.
Perform the brass and acid reaction inside the fume cupboard.
Chemicals
Brass pieces that weigh about 0. 3 grams. -- The hazard associated with brass is copper
toxicity, zinc toxicity, skin irritation, eye irritation and possible explosion. By following the
health and safety this risk can be minimised
5 mol dm-3 of nitric acid. --The hazard associated with nitric acid is corrosiveness to skin and
eye, inhalation hazard and highly reactive which could lead to toxic fumes being released. By
following the health and safety this risk could be minimised
50 cm3 of a 0.5 mol dm-3 Copper (II) nitrate solution. --The hazard associated with copper
(II) nitrate solution is irritation to the skin and eye, it is hazardous to inhale, it could lead to
Voordelen van het kopen van samenvattingen bij Stuvia op een rij:
Verzekerd van kwaliteit door reviews
Stuvia-klanten hebben meer dan 700.000 samenvattingen beoordeeld. Zo weet je zeker dat je de beste documenten koopt!
Snel en makkelijk kopen
Je betaalt supersnel en eenmalig met iDeal, creditcard of Stuvia-tegoed voor de samenvatting. Zonder lidmaatschap.
Focus op de essentie
Samenvattingen worden geschreven voor en door anderen. Daarom zijn de samenvattingen altijd betrouwbaar en actueel. Zo kom je snel tot de kern!
Veelgestelde vragen
Wat krijg ik als ik dit document koop?
Je krijgt een PDF, die direct beschikbaar is na je aankoop. Het gekochte document is altijd, overal en oneindig toegankelijk via je profiel.
Tevredenheidsgarantie: hoe werkt dat?
Onze tevredenheidsgarantie zorgt ervoor dat je altijd een studiedocument vindt dat goed bij je past. Je vult een formulier in en onze klantenservice regelt de rest.
Van wie koop ik deze samenvatting?
Stuvia is een marktplaats, je koop dit document dus niet van ons, maar van verkoper chiam. Stuvia faciliteert de betaling aan de verkoper.
Zit ik meteen vast aan een abonnement?
Nee, je koopt alleen deze samenvatting voor $9.86. Je zit daarna nergens aan vast.
