If you add a metal piece to excess acid, what of listed factors below will increase, decrease, or have no impact on how fast a reaction happens?
a) lower molarity (concentration) of a solution
b) higher molarity (concentration)of a solution
c) increase volume of a solution (with the same molarity)
d) decrease volume of a solution (with the same molarity)
Generally adding more (higher conc) acid will increase rate and lower M will decrease rate. Changing the volume up or down will not impact the rate assuming you have enough to begin with to have a reaction.
Ok, so the shape of the metal affects the reaction rate, correct? And any shape, will increase the rate, right?
I don't think the shape has much to do with reaction rate other than how much surface area is exposed. Increasing the surface area increases the rate of reaction.
When a metal piece is added to excess acid, a chemical reaction between the metal and the acid takes place. This is known as a single displacement or redox reaction. The factors that can affect the speed of this reaction are as follows:
a) Lower molarity (concentration) of a solution: If the concentration of the acid solution is lower, there will be fewer acid particles available to react with the metal. Consequently, the reaction will be slower compared to a higher concentration. Therefore, decreasing the molarity of the acid solution will decrease the speed of the reaction.
b) Higher molarity (concentration) of a solution: On the other hand, if the acid solution has a higher concentration, there will be more acid particles available to react with the metal. This means that the reaction will occur faster compared to a lower concentration. Therefore, increasing the molarity of the acid solution will increase the speed of the reaction.
c) Increase volume of a solution (with the same molarity): When the volume of the acid solution is increased while maintaining the same concentration, it means that the total number of acid particles remains constant. Therefore, the concentration of acid particles in the larger volume will be lower compared to the smaller volume. This is similar to scenario (a), where decreasing the concentration slows down the reaction. Consequently, increasing the volume of the solution will decrease the speed of the reaction.
d) Decrease volume of a solution (with the same molarity): Conversely, decreasing the volume of the acid solution while keeping the concentration constant would result in a higher concentration of acid particles. This higher concentration would increase the reaction rate, similar to scenario (b). Therefore, reducing the volume of the solution will increase the speed of the reaction.
In summary:
- Lowering the molarity of the solution will decrease the speed of the reaction.
- Increasing the molarity of the solution will increase the speed of the reaction.
- Increasing the volume of the solution, with the same molarity, will decrease the speed of the reaction.
- Decreasing the volume of the solution, with the same molarity, will increase the speed of the reaction.