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Chart Data
NaOH
Overview
Data
A balanced chemical equation gives the mole ratios of the reactants and the products as coefficients. When some of the chemical formulas are not known, there is an experiment that can be conducted to help determine the mole ratios.
Volume acid (mL)
Volume NaOH (mL)
Temperature change (°C)
Data Analysis
In this experiment, we use two substances, sodium hydroxide (NaOH) and an unknown acid. The prelab chemical reaction is: a A + b NaOH → products. At the end of the experiment, we will find the actual chemical equation.
50
45
40
30
20
15
10
10
15
20
30
40
45
50
1.92
2.67
3.99
6.52
8.50
9.38
6.89
1. Acquire safety equipment
2. Collect materials
3. Set up the Logger Pro program on your computer
4. Measure out the amounts of NaOH and the unknown acid
5. Record the temperature of just the NaOH solution
6. Add the unknown acid and stir the solution until the temperature becomes constant
7. Repeat the previous steps for seven different measurements of the base and acid
The experiment had two known errors.
The first error was that for one of the measurements the initial temperature was not consistent with the other intial temperatures. We redid that measurement and got better results.
The other error was that one of our peers spilled the unknown acid. So we had to properly clean up our station and redo that measurement.
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