Investigating Factors That Affect Rates Of Reaction
Investigating Factors That Affect Rates Of Reaction
Aim:
How does the mass of calcium carbonate affect its rate of reaction with hydrochloric acid?
Hypothesis:
I hypothesize that when the mass of the calcium carbonate increases, the rate of reaction of the calcium carbonate and hydrochloric will also increase. The collision theory states that the more successful collisions there are within the reaction, the faster the rate of reaction. When the mass increases, so does the number of particles in the reaction, thus increasing the chance of a successful collision. If there were less calcium carbonate, there will be fewer particles to react with the hydrochloric particles, which will lower the chances of successful collisions and thus lowering the rate of reaction. Therefore, the greater the mass of calcium carbonate, the faster the rate of reaction.
Variables
Independent:
The independent variable is the mass of calcium carbonate (CaCO3) 0.2g, 0.4g, 0.6g, 0.8g, and 1.0g.
Dependent:
The dependent variable is the volume of gas collected after 15 seconds. I will measure the variable to determine the rate of the reaction.
Controlled:
Molarity of hydrochloric acid (1M)-molarity of hydrochloric acid should remain constant as the concentration can affect the data
Type of calcium carbonate (Provided by school)
Type of hydrochloric acid (Provided by school)
Type of conical flask (100ml)-the shape of the conical flask can affect the surface area of the calcium carbonate which can result to affecting the data
Type of electronic weight (Provided by school)-the same electronic weight should be used to measure the grams of calcium carbonate so that the weight can be more accurate
Volume of hydrochloric acid (20ml)- use a measuring cylinder to measure the hydrochloric acid, be precise and make sure it stays constant
Volume of water (entire 100ml measuring cylinder)-fill the entire measuring cylinder with water, and make sure it stays constant
Aim:
How does the mass of calcium carbonate affect its rate of reaction with hydrochloric acid?
Hypothesis:
I hypothesize that when the mass of the calcium carbonate increases, the rate of reaction of the calcium carbonate and hydrochloric will also increase. The collision theory states that the more successful collisions there are within the reaction, the faster the rate of reaction. When the mass increases, so does the number of particles in the reaction, thus increasing the chance of a successful collision. If there were less calcium carbonate, there will be fewer particles to react with the hydrochloric particles, which will lower the chances of successful collisions and thus lowering the rate of reaction. Therefore, the greater the mass of calcium carbonate, the faster the rate of reaction.
Variables
Independent:
The independent variable is the mass of calcium carbonate (CaCO3) 0.2g, 0.4g, 0.6g, 0.8g, and 1.0g.
Dependent:
The dependent variable is the volume of gas collected after 15 seconds. I will measure the variable to determine the rate of the reaction.
Controlled:
Molarity of hydrochloric acid (1M)-molarity of hydrochloric acid should remain constant as the concentration can affect the data
Type of calcium carbonate (Provided by school)
Type of hydrochloric acid (Provided by school)
Type of conical flask (100ml)-the shape of the conical flask can affect the surface area of the calcium carbonate which can result to affecting the data
Type of electronic weight (Provided by school)-the same electronic weight should be used to measure the grams of calcium carbonate so that the weight can be more accurate
Volume of hydrochloric acid (20ml)- use a measuring cylinder to measure the hydrochloric acid, be precise and make sure it stays constant
Volume of water (entire 100ml measuring cylinder)-fill the entire measuring cylinder with water, and make sure it stays constant