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

Lab Report - Flame Test

Extracts from this document...

Introduction

Chemistry Lab Report Aim: To determine the colours of the Atomic Emission Spectra of several metallic ions by the flame test. Theoretical background: Flame tests are a quick and easy method of producing the characteristic colours of metal ions. Metal salts contain loosely held electrons that are easily exited on heating. These exited electron then return to a lower energy level by emitting energy in the visible portion of the spectrum, which can be seen as a coloured flame. This colour can be used to determine which ion is being burnt as each ion emits a certain specific combination of wavelengths which correspond to specific colours. Variables: Independent Variable: Metal Salt Dependent Variable: Colour of the flame Controlled Variable: Quantity of the metal salt taken. Apparatus: * Safety goggles * Latex gloves * Nichrome wire * Bunsen burner * Hydrochloric acid * Wash bottle(with distilled water) ...read more.

Middle

The acid has been neutralized when bubbles of gas no longer form after addition of the bicarbonate. If you need to dispose of a small quantity of acid, neutralize the sample bicarbonate before pouring it down the drain. * Do not at any time touch the end of the wire loop used in the flame tests. This wire get extremely hot and can cause severe burns. Remember that a wire can be hot and yet appear no different from a cool wire. Procedure:- * Put on safety goggles and latex gloves. * Fill a beaker with about 10 ml of HCl and light the bunsen burner, making sure to adjust the flame to low (i.e. the flame should be pale blue in colour) * Clean the nichrome wire by washing it first with tap water, then dip it in the HCl and heat it for a couple of seconds using the bunsen burner. ...read more.

Conclusion

Potassium Sulphate Lilac Strontium Chloride Bright red Calcium Sulphate Brick red Calcium Carbonate Brick red Calcium Chloride Brick red Copper Carbonate Green blue Copper Sulphate Green blue Conclusion/Analysis:- From this experiment I have learned that salt solutions containing strontium and lithium, both producing red, have longer wavelengths meanwhile salt solutions containing barium, calcium, and copper have shorter wavelengths. When burning the sample in the flame the colour of the flame wasn't clear. I overcame this problem by using more of the salt until the colour was clear. Also when going from one test to another the tests was contaminated and there was a mixture of colours. I overcame this problem by placing it in the flame then placing it in the hydrochloric acid then placing it in the flame. I did this until I saw that when I place the loop in the flame that there is no colour. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our International Baccalaureate 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 International Baccalaureate Chemistry essays

  1. Determination of potassium hydrogen carbonate into potassium carbonate

    and the same heat capacity as water (4.18 Jg -1 0C-1) Therefore the energy change for for K2CO3 = (30/1000) X 4.18 X -2.25 = (-0.282/1000) KJ � 2.6 % / � 4 % 0.0193 moles Due to using

  2. flame test lab

    The most probable distance increases with increasing "n" value. The excited electron is still "in" the atom even in an excited state. The valence electron will only escape the atom if the electron is given an amount of energy equal to the ionization energy for that atom. Energy can be added to atoms many different ways.

  1. IA - Lab Report. Aim to prepare a sample of p-nitro acetanilide from the ...

    MULTIPLE TRIALS * To be sure of the reading, weigh the crystals twice. SAFETY * Gloves should be worn at all times, through out the experiment * Add the fuming nitric acid slowly drop by drop. * Refrain for inhaling the vapors of nitric acid as they have a corrosive

  2. Identification of Elements: Flame Test

    Although the flame colours of sodium chloride and sodium chloride also contain orange, but the characteristics of their powder were not the same of that of unknown A. It is really hard to determine exactly whether unknown A is calcium nitrate or calcium chloride, because all three of them had white, opaque and medium sized powders.

  1. Chemistry Laboratory Report --- Classification of Chemical Substances

    * Ionic Substances o Ionic substances are chemical compounds in which ions are held together in a lattice structure by ionic bonds. Usually, the positively charged portion consists of metal cations and the negatively charged portion is a halogen or polyatomic ion.

  2. Change of Potential Difference in Voltaic Cells Lab Report

    U- shaped glass tubing is not available to connect the two half-cells. Calculation: 1M of KCl solution can be prepared in the same way of the previous solutions. Molar mass of KCl is 74.55 g/mol. This mass is for preparing 1L which is the volume needed for 5 voltaic cells (5 concentrations of copper sulfate).

  1. Effect of Current on The Quantity of Products in Copper Purification Through Electrolysis

    Mesurer la masse des �lectrodes de cuivre pour le garder constant et qu'il soit initialement identique avec la balance digitale ainsi que les masses initiales des 25 papiers filtres de source identiques. Prendre le tout en note dans un tableau de recueil de donn�es.

  2. Electrolysis of copper sulphate

    Time for 2 minutes using the stopwatch, making sure current remains constant on the ammeter. (figure 2).After 2 minutes has elapsed, turn off power and take out the cathodes carefully. 2. Wash the cathodes with distilled water and dry by lightly padding with a paper towel.

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