Title : NEUTRALIZATION REACTIONS Aim : To determine the end point of a neutralization reaction using temperature. Apparatus : burette , pipette , conical flask , Styrofoam cup , thermometer , hydrochloric acid , sodium hydroxide . Directions : Pipette 25 ml of the alkali in a Styrofoam cup . Record the temperature . Titrate by adding acid from the burette in drops of 0.5 ml . After each drop swirl the flask and record the temperature . Do this until you have added 30 ml of acid . This will only be done once . Do another titration once using phenolphthalein as an indicator . Questions : At what volume was the temperature the highest ? What does this indicate and why ? Why was a Styrofoam cup used ? Draw a graph of volume of acid add ( x-axis) vs. temperature . How does the results from the temperature method compare to that of the indicator ? Which do you believe is more accurate ? Criteria : ANALYSIS AND INTERPRETATION Results 2 mks Graph 2 mks Discussions 8 mks