• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Qualititive Inorganic Analysis Using the Flame Test.

Extracts from this document...


1. State what ?qualitative inorganic analysis? means. This technique used in analytical chemistry aims to identify the elemental composition of inorganic compounds. Its focus is mainly on the detection of ions in an aqueous solution. Even when substances are in other forms, they are brought into the aqueous state if necessary, before the use of these standard methods. The aqueous solution is mixed with different reagents in order to test for reactions that are characteristic of certain ions. These reactions may cause solid formation, change in colour and other visual changes. 1. Identify and explain the errors for your analysis. Nickel wire contamination: The nickel wire which is used in introducing the chemical with the blue flame given out of the Bunsen burner could get contaminated if it is not changed constantly through the stages of different chemicals being used. ...read more.


This process should be repeated until there is no colour present in the flame. The reason for dilute hydrochloric acid being used instead of concentrated acid is due to safety reasons; however, it is not always good at giving intense flame colours. Each time a new chemical is being used the wire should be changed again to reduce contamination. ??Platinum could be used instead of nickel because it is much better at giving intense flames and it does not produce any colour in the flame whereas nickel wire always gives a small tint of orange in the flame; nonetheless, it is much more expensive than a nickel wire.?? (nichromewire) Misreading Inferences: To improve the misreading of the chemical according to its appearance, it must be renewed every once in a while. ...read more.


For Nickel (II) a blue-green flame colour was observed, however in the table provided this indicates Copper (II); therefore copper (II) was written in the inference box. Nickel (II) sulphate was not dissolved carefully in the deionised water during the ammonia test, which is why it was observed as blue precipitation and that dissolved to give a deep blue solution when excess ammonia was added. Normally, green precipitation is observed and it dissolves to give a blue solution when excess ammonia is added; therefore, copper was written in the inference box which was incorrect. During the silver nitrate test for Iron (III) chloride, cream precipitation was observed and was mistaken for bromide, however the precipitation was white and the actual anion was chloride. In conclusion, the results were conclusive however they had to be repeated several times to ensure accuracy. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Inorganic Chemistry section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related AS and A Level Inorganic Chemistry essays

  1. Peer reviewed

    Determining the concentration of acid in a given solution

    5 star(s)

    This is to ensure that the concentration of the sodium carbonate was even throughout the volumetric flask. If I didn't invert the flask then the first titres would be using the solution from the bottom of the flask which would have a higher concentration of sodium carbonate as it was added to the flask first.

  2. Peer reviewed

    Deducing the quantity of acid in a solution

    5 star(s)

    Accuracy means the quality of nearness to the truth or the true value. That is why being accurate is the most important aim in this experiment. There could have been both precision and procedure errors that could have affected this aim.

  1. an experiement to test for anions and cations

    Gloves should be worn, with both gloves and hands being thoroughly washed when finished with the experiment. Fume cupboard Should be switched on to provide ventilation for any toxic/pungent fumes. Method Testing for cations (Substance I) 1. A small spatula of substance I was added to a test tube, along with distilled water filling half of the test tube.

  2. Cube compressive strength test

    Types of failure other than the above figures are regarded as unsatisfactory and indicate a probable fault in the testing machine. Unsatisfactory failure Results of Cube (1) Front side Right side Back side Left side Results of Cube (2) Front side Right side Back side Left side Results of Cube (3)

  1. decomposition of copper carbonate

    copper carbonate * 0.15g copper carbonate * 150 cm� distilled water * 1 100 cm� beaker, container to keep end of burette under water * 1 sheet of paper * 1 Thermometer for correct measurement of temperature * barometer (not available) * Sketch Method 1 wear goggles and lab coat.

  2. The preparation, analysis, and reactions of an ethanedioate complex of iron

    Then few more drops of tin(II) chloride were added . Once the solution was cooled to room temperature, one portion 10cm3 of mercury(II) chloride solution was added quickly. 10cm3 of 40% phosphoric acid and 10 drops of barium diphenylamine sulphonate indicator solution were added to the reduced solution.

  1. Percent Yield Experiment. The limiting reagent for this experiment is strontium chloride hexahydrate. ...

    Secondly are impurities accumulated through water. Non-distilled water can contain many minerals and impurities , aswell as absorbing chemicals in the surrounding air which can skew results. According to the city of Ottawa's website, there are many contaminants in water, the two of those being fluoride and chlorine.

  2. The aim of this investigation is to analyse what cations and anions are present ...

    soon as possible Rubidium Chloride irritant Contact with eyes Always wear goggles Low risk Wash eyes out with clean water Copper Chloride Harmful Harmful and dangerous to the environment Keep in a vandalised area Medium risk Get medical help as soon as possible Calcium Chloride irritant Skin irritation Wash hands

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work