Catalyst
What is the enzyme that speeds up the breakdown of hydrogen peroxide?
Catalase
Magnesium Ribbon + Hydrochloric acid -->
Magnesium Chloride + hydrogen
The ______ the concentration of the hydrochloric acid the more hydrochloric acid particles there are in a given amount of space.
higher
The _______________ the surface area the faster the reaction.
larger
How to test the presence of hydrogen gas?
Splint Test
______ are biological catalyst that speed up the breakdown of the molecules of food in your digestive system
Enzyme
Calcium Carbonate + Hydrochloric acid -->
Calcium Chloride + Carbon dioxide +water
As the concentration of reactants _________, the rate of reaction ______________.
Increase, Increase
Which has less surface area, the powdered calcium carbonate or the marble chips?
marble chips
How to test for the presence of carbon dioxide gas?
Lime Test
How can the chemical manufacturers make their products quickly and cheaply as possible?
by adding a catalyst.
Magnesium Ribbon + Sulfuric acid -->
Magnesium Sulphate + Hydrogen
Highly concentrated solution will have a _____ line graph compared to the low concentrated solution.
steeper
When a solid lump is cut into pieces, its total surface area ____________.
Increases
Particles move every time. When the temperature of the reaction is increased, the particles move ___________ then they will collide more often, and with more energy.
Faster
Give an example of a chemical catalyst.
Manganese dioxide
Manganese dioxide + Hydrogen peroxide -->
Water + Oxygen
We can dilute an acid with adding _________ in our acid solution.
distilled water
What would happen to the reaction if you use a powdered calcium carbonate and combine with your hydrochloric acid?
There will be a faster reaction since the calcium carbonate have larger surface area
As the temperature decrease the rate of reaction _______
decrease
Catalyst are often used to speed up reactions in industrial processes. Can we use the same catalyst over and over gain?
Yes, even if it was used again they still have the same reaction, which makes them a cheaper than increasing the temperature.
Sodium Thiosulfate + Hydrochloric acid -->
Sulfur Dioxide + Sulfur + Water
How can you make your experiment more accurate and reliable?
Taking multiple trials for the experiment
Determine a controlled variable
All of the independent variable should be constant through out the experiment.
Determine the dependent and independent variables in the experiment below. Both flask have HCL on it.
You added a powdered calcium carbonate on Flask A, and added the marble chip on Flask B. Both flask have different reaction, Flask A produces more gas and Flask B have less reaction.
Dependent Variable: The surface area of the calcium carbonate
Independent Variable: The same concentration and same volume of the HCL on both flask.
When sodium thiosulfate is mixed with hydrochloric acid it formed sulfur, sulfur dioxide and water. Since, sulfur is insoluble in water it will form a ____________ which is the reason why we see that the mixture becomes cloudly.
precipitate