Respuesta :
The correct statements are:
1. At chemical equilibrium, the forward and reverse reactions have stopped.- This is true. Chemical equilibrium is reached when the rate of the forward reaction equals the rate of the reverse reaction. This means that the concentrations of reactants and products remain constant over time, but it doesn't mean they are equal, just that they are stable.
2. Adding reactants tends to shift a reaction towards the right.- This is true according to Le Chatelier's Principle. If you add more reactants to a reaction that is not at equilibrium, it will tend to shift towards the products side to counteract the increase in reactants.
3. Living cells can shift reactions to the right by removing waste products.- This is true. Cells can remove waste products, which effectively reduces the concentration of products and can shift the equilibrium of a reaction towards the right, favoring the formation of more products.
1. At chemical equilibrium, the forward and reverse reactions have stopped.- This is true. Chemical equilibrium is reached when the rate of the forward reaction equals the rate of the reverse reaction. This means that the concentrations of reactants and products remain constant over time, but it doesn't mean they are equal, just that they are stable.
2. Adding reactants tends to shift a reaction towards the right.- This is true according to Le Chatelier's Principle. If you add more reactants to a reaction that is not at equilibrium, it will tend to shift towards the products side to counteract the increase in reactants.
3. Living cells can shift reactions to the right by removing waste products.- This is true. Cells can remove waste products, which effectively reduces the concentration of products and can shift the equilibrium of a reaction towards the right, favoring the formation of more products.
Answer:
- Adding reactants tends to shift a reaction towards the right.
- Living cells can shift reactions to the right by removing waste products.
Explanation:
Out of the given options, the following statements are true:
- Living cells can shift reactions to the right by removing waste products. This is because removing waste products pulls the reaction towards the product side, according to Le Chatelier's principle.
- Adding reactants tends to shift a reaction towards the right. This is also based on Le Chatelier's principle, which states that a system at equilibrium will respond to a stress by shifting in the direction that counteracts the stress. Adding reactants is a stress that can be counteracted by producing more products.
The other statements are not true:
- Homeostasis is not the maintenance of chemical equilibrium, but rather a dynamic state where various internal factors are kept within a relatively narrow range. While chemical processes play a role in homeostasis, it's not the whole picture.
- At chemical equilibrium, the concentrations of reactants and products do not necessarily have to be equal. They just need to be in a constant ratio.
- At chemical equilibrium, the forward and reverse reactions do not stop. They continue at equal rates, resulting in no net change in the concentrations of reactants and products.
