Student name: Sara Hattar Grade: 10 ”C” |
Teacher: Christine Ziadat|
Title: Investigating the effects of changing the concentration of an acid on the rate of reaction between HCl and Magnesium. Aim: In this experiment we are going to see the effects of using three different concentrations of HCl when added to Magnesium metal on the rate of reaction. Hypothesis: If the concentration of the acid increased in reaction between HCl (the acid) and magnesium, then the rate of reaction will increase. Scientific background:
For many reactions involving liquids or gases, increasing the concentration of the reactants increases the rate of reaction. As reactant concentration increases, the frequency of collision increases. In a few cases, increasing the concentration of one of the reactants may have little noticeable effect of the rate, but usually when increasing the concentration of any acid the rate of the reaction increases. Variables:
Independent: The concentration of the acid (HCl: 0.5, 0.6, 0.7) Dependent: The rate of reaction between HCl and Mg
1- Room Temperature.
2- Amount of Magnesium (0.5 g)
3- Amount of acid HCl (20 ml)
a- Water Bath
c- Electrical balance (±0.01g).
d- Magnesium (0.9 g)
e- HCl (60ml).
f- 3 Glass containers.
1- Get all materials needed.
2- Measure on the electrical balance 3 amounts 0.3 g of Magnesium. 3- Use the syringe to measure 20ml of HCl added to the flask in the water bath after adding the Magnesium in the flask. 4- Start the stopwatch and measure the amount of H2 produces each 5 seconds. 5- Write down the results you get at the end of 10 minutes. 6- Do the same for the other 2 concentrations.
Reaction time (seconds)± 0.01| Volume of H2 gas produced by 0.5 M concentrated...