Chemistry Lab #1
THER 368: Temperature of Neutralization
The goal of this lab was to:
* Determine heat of neutralization for the response of salt hydroxide (NaOH) and hydrochloric acid (HCI).
The heat of neutralization (в€†Hneutzn ) is a heat transmitted when 1 mol of an acid responds with one particular mol of a base. This kind of heat is usually reported in either kilojoules per gopher (kJ/mol) or perhaps kilocalories per mole (kcal mol). The reaction of HCI and NaOH solutions is shown in Equation 1 .
HCI(aq) & NaOH(aq) H20(l) + NaCI(aq) (Eq. 1)
The heat of neutralization for a reaction cannot be measured straight. However , the heat transferred within a neutralization reaction can be worked out from laboratory data.
Glasses: (2) 150-mL beaker, managed to graduate cylinder, a glass rod, (2) thermometer Tools: Ring stand, double thermometer clamp, polystyrene cup Chemical compounds: 2M hydrochloric acid, 2M sodium hydroxide.
In this experiment, you will identify the temp change (в€†T) for a neutralization reaction as follows.
In the laboratory, you will measure time-temperature info at various 30-s periods over a 5-min period intended for measured quantities of NaOH solution along with HCI option. After you blend the two alternatives, you will collect time-temperature data at your five. 5 min and then for 1-min times over a 15-min period for the mixture. From time-temperature graphs of the data, you can find AT. You can expect to plot the temperature in degrees C on the ordinate (y-axis). You can plot the time in minutes for the abscissa (x-axis). Use of a great interrupted temperatures axis is known as a convenient method to story such info.
After the info is plotted, you will pull a top to bottom line, perpendicular to the x-axis through the level on the x-axis that signifies the time of mixing. Next you will draw the best straight series through the drawn points to get the temp of each with the...