factors affecting rate of diffusion

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Question:Identify the major factor affecting reaction rates that accounts for the following abservations: 1. tadpoles grow more rapidly near the cooling water discharge from a power plant. 2. enzymes accelerate certain biochemical reactions, but are not consummed. 3. Campfires are started with twings rather than logs for wood. 4. Iron and steel corrode more rapidly near the coast of an ocean than in the desert. please help!

Answers:1. increased temperature 2. catalyst 3. increased surface area 4. presence of moisture, or salt (catalyst).

Question:What factors affect the breathing rate?

Answers:Many things: stress, pain, anxiety, excercise, drugs, alcohol, disease (mainly heart and lung). Allergies, sleeping, abnormal brain problems.

Question:what are the 4 factors that effect reaction rate and how would you describe them? in the meaning of science...

Answers:If gases are on either side of the reaction, then pressure will effect reaction rate. The classic answers are: 1. Temperature 2. Pressure 3. Concentration 4. Surface Area (this can also be expressed as how finely ground the solids are)

Question:Changing from a weak acid to the salt of the same acid with a strong base increases the dissolution rate. Which factor is affected? -Surface area -Diffusion coefficient -Concentration in stagnant layer -Concentration of solvent -Thickness of stagnant layer Thanks!

Answers:-Surface area

From Youtube

Factors Affecting Rate Of a Reaction An Activity :Check us out at www.tutorvista.com The nature of the reaction: Some reactions are naturally faster than others. The number of reacting species, their physical state (the particles that form solids move much more slowly than those of gases or those in solution), the complexity of the reaction and other factors can influence greatly the rate of a reaction. Concentration: Reaction rate increases with concentration, as described by the rate law and explained by collision theory. As reactant concentration increases, the frequency of collision increases. Pressure: The rate of gaseous reactions increases with pressure, which is, in fact, equivalent to an increase in concentration of the gas. For condensed-phase reactions, the pressure dependence is weak. Order: The order of the reaction controls how the reactant concentration (or pressure) affects reaction rate. Temperature: Usually conducting a reaction at a higher temperature delivers more energy into the system and increases the reaction rate by causing more collisions between particles, as explained by collision theory. However, the main reason that temperature increases the rate of reaction is that more of the colliding particles will have the necessary activation energy resulting in more successful collisions (when bonds are formed between reactants). The influence of temperature is described by the Arrhenius equation. As a rule of thumb, reaction rates for many reactions double for every 10 degrees Celsius increase ...

Factors Affecting Reaction Rates.flv :Shows how the various factors including temperature, concentration, pressure, nature of reactants, presence of a catalyst etc. can affect the rate of a chemical reaction.