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

Preparation and standardisation of HCL & NaOH solutions

Extracts from this document...


PREPARATION AND STANDARDAIZATION OF HCL & NaOH SOLUTIONS LAB PARTNER: Ryan McPortland October 27, 2008 Introduction: Purpose of this lab was to prepare solutions of acid base and then standardize them by using the titration method. Then use them to determine the unknown concentration of an acid solution. Titration is a procedure that is used to study the stoichiometry of a reaction. Before we start the lab we have to some pre-lab exercises. The first exercise is to calculate the number of grams of NaOH required to make 250 mL of a .1 M solution of NaOH. When we calculate this we get 1g. Then the second exercise was to calculate the number of milliliters of 1.20 M HCL required to make 100.0 mL of a .100 M solutions of HCL. ...read more.


mol .0102 mol .00109 mol Moles HCL .0019 .0102 mol .00109 mol Molarity of HCL .093 M .093 M .092 M Average Morality .093 M - - Concentration of Unknown HCL Solution..........Unknown 2 Sample 1 Sample 2 Sample 3 Volume of HCL 12 mL 12 mL 12 mL Initial Volume NaOH, Vi (mL) Final Volume NaOH used (mL) 16 mL 21.2 mL 26.6 mL Total Volume NaOH, used (mL) 15 mL 5.2 mL 5.4 mL Molarity NaOH .093 M .093 M .093 M Moles NaOH .000484 mol .000484 mol .000502 mol Molarity of HCL .000484 mol .000484 mol .00502 mol Molarity of HCL .040 M .040 M .042 AVERAGE MOLARITY .041 M Conclusion- The titration methods were use to prepare solutions of acid and base and also to determine the unknown concentration of an acid solution. ...read more.


3. Would the calculated molarity of the HCL solutions be higher or lower or not affected if each of the following occurred. Explain your answers A. The buret containing NaOH was rinsed with distilled water but not rinsed with NaOH before being filled. Reduce NaOH concentration, more NaOH would be used. Therefore molarity of HCL would be more. B. The calculated molarity was too high The moles of NaOH used would be high. Therefore HCL would be high C. The tip of the NaOH buret contained an air bubble at the beginning of the titration but not at the end. It would seem like more NaOH was used Therefore HCL higher. 4. Suppose you used the base Ca(OH)2 instead of NaOH. What changes would need be made to the calculations of the HCL concentrations? It would have to double because twice as more OH ions are used. ?? ?? ?? ?? ...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. Acidic Solutions.

    M 106 gmol-1 Mass of bottle and contents before transfer, M1 g Mass of bottle and contents after transfer, M2 g Mass of Na2CO3, m = (M1 - M2) g Amount of Na2CO3 , n = m/M mol Volume of solution, V 0.25 dm3 Concentration of Na2CO3 , c =

  2. How much Iron (II) in 100 grams of Spinach Oleracea?

    x 7.17 cm3 1000 The volume of the average titre is divided by 1000 to change the units from cm3 to dm3. Moles = 0.00017925 mol dm-3 The ratio of Potassium Manganate (VII) (aq) to Iron (II) (aq) is 3:5 and therefore to work out the mols of Iron (II)

  1. To investigate the effect of concentration on the temperature rise, heat evolved and heat ...

    Moreover, the points existing after 30cm3 volume are almost straight for all the three graphs except for the 3 M where the points are above the line of best fit; this maybe because of error in my measurement of the temperature.

  2. The preparation of 1- Bromobutane

    While I will be using Concentrated Hydrochloric Acid, I will carry out stages in a fume cupboard to be safe from any fumes that may be given off. 3. Nitric Acid ( HNO3 ) Nitric Acid is a strong oxidising agent, and can cause burns and harm if contacted with skin.

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