• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month
Page
  1. 1
    1
  2. 2
    2
  3. 3
    3
  4. 4
    4
  5. 5
    5
  6. 6
    6
  7. 7
    7
  8. 8
    8
  9. 9
    9
  10. 10
    10
  11. 11
    11
  12. 12
    12

The determination of the solubility of calcium hydroxide.

Extracts from this document...

Introduction

Aim The experiment practical I am going to do is all about the determination of the solubility of calcium hydroxide. This can be found by titrating the saturated solution against a solution of an acid whose concentration you know. The acid whose concentration we know is hydrochloric acid. The calcium hydroxide will be in limewater and this will have to be diluted before used. These two solutions will react together and a colour change will occur. Calcium hydroxide dissolves only slightly in water to form an alkali solution. Introduction A titration is when two solutions react together. It is a technique to find the concentration of unknown solution. It is a method of quantitative analysis. One solution, which has a known concentration, is filled into a burette and the second solution is placed in a conical flask. A solution of known concentration or known morality is called a standard solution. In each titration the solution with the unknown concentration is filled in the burette is added in small measured quantities to the solution in the conical flask until just enough has been added for the reaction to be complete. ...read more.

Middle

As if you make the hydrochloric acid too concentrated this can effect your titration results. Suitability: This is a very suitable and effective way to do and calculate a titration as is done this way all the time. It can show effective colour change. Risk assessment: Safety: Safety is very important when carrying out any practical experiment in the lab. Many general rules need to be followed in order to make sure we carry out our practical safely General rules: * Wear goggles at all time during the practical. * Wear lab coats to protect clothing. * If needed wear gloves. * Tie long hair back * Handle all glass equipment with care. Solutions: Calcium Hydroxide in lime water CORROSIVE = causes burns. Irritating to eyes, skin and respiratory system so do not inhale. Acid If: What to do: Protection Calcium Hydroxide swallowed Wash out mouth. Seek medical attention. DON'T BE SO STUPID!!! ,, ,, Solution gets into eyes Flood the eye gently with water for 10 minutes. If needed seek medical attention. Be very careful when handling. Wear gloves. ,, ,, If spilt on skin or clothes Remove contaminated clothing. ...read more.

Conclusion

A good technique will involve: Method can be improved by: * the solution in the volumetric flask needs thorough mixing * all equipment should be washed out using distilled water * the end point of the titration can only be determined accurately if the solution from the burette is added drip by drop with swirling as the end point is reached. * When an indicator is used in a titration only the minimum number of drops is added each time. There was not really any anomalous result as all the 3 titration's done has very close and similar readings The titration was done 3 times to improve the reading of the experiment. Any additional titration's done after 3 times were not really necessary to ensure that the results were accurate. The overall accuracy and reliability of the evidence that the experiment supplied is reasonably accurate as the 2 solution did react together well and a noticeable colour change from a pale orange to a permanent pink was visible. Due to the percentage error in the experiment technique is could have resulted in maybe the readings being slightly lower then they really should have been. Coursework Solubility of calcium hydroxide By Sabina fareed Reference chemical ideas book Chemistry for you by lawrie ryan Chemical ideas work sheets ...read more.

The above preview is unformatted text

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

  1. Marked by a teacher

    Investigate the effect of changing the concentration of sodium hydroxide (alkali) on the volume ...

    4 star(s)

    The use of phenolphalein indicator lowers the risk of obtaining false results as the point of neutralisation is visualised. Dilute hydrochloric acid The acid which will be used to neutralise the alkali (sodium hydroxide. Dilute hydrochloric acid was used to neutralise the alkali because like all acids it contains hydrogen

  2. Marked by a teacher

    Determine the solubility product of calcium hydroxide

    3 star(s)

    When the solution turns from yellow to peachy orange color, stop the titration. 8. Record down the amount of 0.05M of Hydrochloric acid used. 9. Repeat Step 1 to Step 9 using solution II, III, IV. RESULT Solution I II III IV Final reading (cm3)

  1. To investigate the rate of reaction between different concentrations of hydrochloric acid with metal ...

    the acid's density is bigger than the water's, so it will sink to the bottom and it will heat the water up, otherwise if put in the other way the water will float on top of the acid, and will react violently, including spitting the contents out of the beaker.

  2. Investigating the effects of changing the concentration of different solutions on the refractive index ...

    Next fill a watch glass with solution. Then, put a coin onto the surface of the solution and allow it to sink to the bottom. Afterwards, place the watch glass under the microscope. Adjust the microscope until a clear picture of the coin is shown.

  1. Find out the percentage of citric acid present in lemon squash by using a ...

    And also safety glasses just in case there are any splashes. As our school desks are made of wood, which are varnished, the hot water could easily melt the tin and wearing layer of varnish on the table, for that we will put a few layers of news paper to

  2. Determination of the Solubility of Calcium Hydroxide.

    Fill up the volumetric flask with distilled water up to the 250cm3 mark. Ensure the bottom of the meniscus is on the 250cm3 line. Add a rubber bung into the end of the volumetric flask, and shake to mix the hydrochloric acid with the water.

  1. To carry out a titration between a strong acid and a weak alkali, to ...

    * If glass is broken, inform the teacher. Obviously broken glass is dangerous and you could cut yourself. * Running is prohibited in the laboratory to prevent injury, as you could fall over or hit something as you run past. The plan I have devised is likely to produce accurate and reliable results because I am washing out all my glassware to prevent contamination.

  2. Titrating Sodium hydroxide with an unknown molarity, against hydrochloric acid to find its' molarity.

    I first asked the other students within my class what molarity they calculated the acid to be. More or less the same molarity was calculated, there were differences of about 0.002moldm-3. However, I counted these types of figures as negligible.

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