Aim: To produce sodium chloride salt by carrying out a neutralization reaction
Equipment: 50mL and 200 mL beakers, dilute HCI (hydrochloric acid), dilute NaOH (Sodium hydroxide), 25 mL measuring cylinder, a glass stirring rod, spotting tile, Universal indicator solution, tripod, gauze mat, Bunsen burner, evaporating basin.'
Method:
1. Using the measuring cylinder measure 10 mL of HCI and pour it into your 50 mL beaker. Add dilute NaOH a few drops at a time while stirring with the glass rod.
2. Every 10-15 drops stop adding the NaOH and use the glass stirring rod to transfer a drop of the solution to a spotting tile. Test its pH using Universal indicator.
3. Keep adding NaOH and testing the solution by repeating step 2. As you get closer to neutral you may need to test the solution after every drop.
4. Pour the neutral solution into an evaporating basin and evaporate the water out of the solution using the equipment set up shown above.
Observations: We made a variety of colours such as purple, light pink, and red. The aim of this was to make green which we couldn't make.
Good job. Did you enjoy Chemistry? Could you explain what happened to the NaOH and HCl molecules when mixed (reaction) in terms of ionic bonding to form NaCl? Perhaps you could write the chemical equation for this experiment. The end result (NaCl) and by-product (H2O) would be on the opposite side of the reaction process. Keep up the good work dear. Remember safety first in the science lab at all times.
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