Particle size Flashcards
Preparing Carbon dioxide gas
What does rate of reaction depend on?
Particle size
The smaller the particle size…
The faster the rate of reaction
How to measure rate of reaction
By the loss in mass of reactants
Carbon dioxide dissolves in…
water
Dust explosions?
Substances in powdered form have larger surface area. So substances such as flour, grain, coal dust can react very quickly as they burn in air.
What can cause a dust explosion?
Spark or flame
Does the mass of the marble chips increase or decrease?
Decreases overtime
The loss in mass of smallest marble chips….
is the fastest
What would happen if powdered marble chips were used?
The reaction would be so fast, it cannot be measured accurately
Characteristic test for CO2?
Lime water turns from clear to milky if CO2 is present
Whats a biochemical reaction?
Chemical reaction that takes place in a living thing eg. plant (photosynthesis), respiration, digestion
2 things biochemical reactions are affected by?
Temperature- only takes place in specific temperatures
pH- Enzymes only work at specific pH values
