Help please. Aisha drops an antacid tablet in water and times how long it takes to dissolve. Which of the following will decrease the reaction rate?

I'm pretty sure you decrease the water temperature or you increase it.

A. increasing water temperature

B decreasing water temperature
C.using more water

increase it

To determine the factors that can decrease the reaction rate of an antacid tablet dissolving in water, we need to consider a few possibilities. Here are four factors that can potentially affect the rate of dissolution:

1. Temperature: Generally, increasing the temperature of the solvent (in this case, water) will speed up the dissolution process. Conversely, decreasing the temperature will slow it down. Therefore, decreasing the temperature of the water will decrease the reaction rate.

2. Surface Area: The more surface area exposed to the solvent, the faster the dissolution. If the antacid tablet is crushed into smaller pieces, it will increase the surface area available for the water to react with. So, if the tablet is intact or less fragmented, it will decrease the reaction rate.

3. Agitation: Stirring or agitating the solution allows the water molecules to interact with the antacid tablet more frequently, promoting faster dissolution. If Aisha avoids stirring or shaking the solution, it will decrease the reaction rate.

4. Concentration: Higher concentrations of the antacid substance in the tablet will provide more particles to dissolve, thus increasing the reaction rate. Conversely, if the tablet has a lower concentration of the active ingredient, it will decrease the reaction rate.

In this case, since we are looking for factors that would decrease the reaction rate, the correct answer would be to decrease the temperature, keep the tablet intact or less fragmented, avoid stirring or shaking the solution, or use a tablet with a lower concentration of the antacid substance.

It's important to note that these factors can vary depending on the specific properties of the antacid tablet and the solvent used.

None of them.

Why don't you try it?