Coursework.Info - Inspiration in an Instant

On the left is an image preview of every page of this document, and below are the first 150 words with formatting removed:

Dilutions - pH acids/bases Objective The aim of the first part of the experiment was to make up dilutions from acid and base solutions and record the results after adding various indicators. The aim of the second part of the experiment was to determine the pH values of the dilutions using both pH paper and a pH metre recording the results for both tests. Procedure - Part 1 For the first part of the experiment the correct amount of solid NaOH needed to prepare 250 cm3 of a 0.1M solution was calculated and then weighed out in a weighing bottle using balanced scales. The weight of the empty bottle was recorded, minus lid before adding approximately 1g of solid NaOH, re-weighing the bottle plus contents and the new weight recorded. The Solid NaOH was then transferred to a 200 cm3 beaker where approximately 150 cm³ of H2O was added to it and the solution stirred...

To see the full version of this document, and 145,348 others