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

Investigation into the dibasicty of sulphuric acid

Extracts from this document...


OCR (2812/03/PLAN) Practical Examination 1 (Part A - Planning Exercise) Aim The aim is to prove that Sulphuric acid is a dibasic (diprotic) acid. Dibasic (diprotic) means that the acid in this instance H2SO4 contains two hydrogen atoms that can be ionized [http://www.thefreedictionary.com/dibasic] Experiments In order to prove its dibasicity I have to plan out two different methods, the first will include gas collection as the other will be a titration Hazard and safety precaution H2SO4 is very corrosive and can burn the skin therefore I shall wear gloves when handling the concentrated acid, also incase there is any spillage of the acid I shall clean it up with plenty of water or I shall use a weak alkali to neutralise the acid. Gas Collection The first experiment that I will be doing will be a gas collection I will be reacting magnesium with a monobasic acid (hydrochloric acid) and a dibasic acid (sulphuric acid), and will be measuring the amount of H2 gas being produced. To do this experiment I will need to use the apparatus shown in the picture below. ...read more.


To calculate the % error I must do the accuracy of the equipment over the mass of the Mg times 100 (0.01 � 0.070874) x 100 = 14% (This is an estimate) If I was using a more accurate method of weighing the mass using scales that had and accuracy of 0.001g I'd have a lower % error. (0.001 � 0.070874) x 100 = 1.4% (This is an estimate) I now need to calculate the minimum volume of H2SO4 required to produce 0.002916 moles of H2. Using the molar ratio of 1:1 I know I need 0.002916 moles of H2SO4. To work out the volume I will use the formula Volume = Moles � Concentration (The initial concentration of H2SO4 is 1moldm-3) 0.002916 � 1 = 0.002916 0.002916 x 1000 = 2.916cm3 For the actual experiment I will use 5cm3 of the H2SO4 to ensure there is excess acid to react with the Mg (0.07g). To prove that the H2SO4 is dibasic I am going to use the ionic equation which is 2H+ + 2e- --> H2 This is in consideration that I have collected approximately 70cm3 of H2 gas, I can show that I have collected 2 moles of H2 gas. ...read more.


Then silver nitrate solution is added. Various precipitates may be formed from the reaction between the silver and halide ions. To check that you have got bromoethane a very pale cream precipitate will have formed * Test for butan-1-ol To test for a primary alcohol you must oxidise the alcohol by heating with acidified aqueous potassium dichromate (VI), on gentle heating the primary alcohol will produce aldehydes . While the aldehyde is formed it must be separated by distillation as they are formed seeing as their more volatile than their corresponding alcohol. Upon stronger heating under reflux with an excess of acidified dichromate (VI), they aldehydes are oxidised to carboxylic acids. To see if you have a primary alcohol you would notice a distinct change to a very dark shade of brown/green. * Test for 2-methylpropan-2-ol To test for this secondary alcohol you would add a couple of drops of the alcohol into a test tube containing potassium dichromate (VI) solution acidified with dilute sulphuric acid. The tube would be warmed in a hot water bath. After heating over a sufficient period of time the tertiary alcohol should turn orange. ?? ?? ?? ?? WTFCOURSEWORKINGO Candidate Number: 5621 Centre Number: 12828 Page | 1 ...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 Organic 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 Organic Chemistry essays

  1. The preparation of cyclohexene from cyclohexanol

    Why the temperature of the still head should not exceed 90 degree in this experiment? As if the product received over 90 degree is the other product, like the water or acid vapours, not the cyclohexene. 5. What is the function of sodium chloride and anhydrous sodium sulphate in this experiment?

  2. Preparation of haloalkane. The purpose of this experiment is to prepare 2-chloro-2-methylpropane from ...

    The mechanism of SN1 is discussed above which involves a carbonium ion. SN2 does not require the formation of carbonium ion but it requires the collision of the nucleophile and the OH group. For SN2, the mechanism is as below, This pathway also forms 2-chloro-2-methylpropane In this experiment, the rate of SN1 reaction dominates.

  1. F336- aspirin individual Investigation

    After I pour the content to all the test tubes into a 100ml conical flask and add 50 ml of water and swirl the mixture. Then I place the conical flask in cold ice for the solution to cool and crystallise.

  2. The aim of this experiment is to produce Aspirin. This is an estrification in ...

    The purity of a substance can be determined by its melting point. A pure substance has a specific melting point. If the melting point of the same substance is measured and is found to be lower than the standard value, the substance is not pure since impurities lower the melting point of a substance.

  1. Comprehensive and Detailed Chemistry notes

    Table and outline the relationship between position of elements in the Periodic Table and acidity/basicity of oxides -- Metals of Groups I and II all form basic oxides. The basicity increases down each group -- Most non-metals form acidic oxides.

  2. investigating the amount of ascorbic acid present in fruit

    5% H2SO4 To make up the ascorbic acid solution. 4% KI Acts as an indicator of show the presence of vitamin C by turning into a dark blue-black complex, when it has reacted with the 1% soluble starch. 10% Acetic Acid To make up the ascorbic acid solution by acting as the acid.

  1. coursework plan for halogenalkanes

    The carbon atom is less electronegative then the halogen atoms so the electrons in the bond are more nearer to the halogen. The carbon atom will now have a partial positive charge known as ?+ (delta plus) and the halogen atom will have a partial negative charge known as ?- (delta minus).

  2. Esterfication. he purpose of this lab is to achieve a specific odour through ...

    This can be determined taking into consideration that the greater the forces of attraction then the higher the melting and boiling point similar to how greater the polarity then the higher the melting and boiling point. In terms of solubility, members of the carboxylic acid family can be expected to be soluble in water since polar dissolves in polar substances.

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