Question

During an investigation, the contents of two test tubes were mixed in two different water baths at different temperatures. A record of the investigation is shown below:

HELP PLEASE!!!!!

Investigation Record
Water Bath Temperature of Bath Substances in Test Tubes
1 160 °F one test tube with deep blue colored starch and iodine solution; one test tube with saliva solution
2 80 °F one test tube with deep blue colored starch and iodine solution; one test tube with saliva solution


The deep blue color of the starch and iodine solution disappears when it reacts with saliva. Which of the following best explains the rate of disappearance of the color when the substances in the test tubes were mixed?
Faster in Bath 1 as molecules collide more frequently in Bath 1 than Bath 2
Faster in Bath 2 as molecules collide more frequently in Bath 2 than Bath 1
Faster in Bath 1 as molecules move slower in Bath 1 than Bath 2
Faster in Bath 2 as molecules move slower in Bath 2 than Bath 1

Answer 1

The disappearance of color is faster in Water Bath 1 where the temperature is higher, leading to more frequent molecular collisions and increased enzyme activity.

Step-by-step explanation:

The investigation record you provided indicates that the contents of two test tubes were mixed in two different water baths at different temperatures, both containing a mixture of deep blue colored starch and iodine solution with saliva. The change in color you are referring to is indicative of the reaction between the saliva's enzymes and the starch, where the enzymes break down the starch causing the color to disappear.

The correct explanation for the rate of disappearance of the color is that it is faster in Water Bath 1 as the temperature of 160 °F results in molecules colliding more frequently compared to Water Bath 2, which is at 80 °F. An increase in temperature generally increases enzyme activity until a point of denaturation is reached, hence the reaction is quicker in the hotter water bath.

Regarding the reference material and links, in the context of diffusion demonstrated by two beakers, the correct option is (c): The higher temperature of left beaker causes faster diffusion of yellow dye in the left beaker.

Answer 2

Alright i know this question was asked years ago, but for those who still need the answer, it would be A.

The reason why, is because when particles move faster, and the speed of the molecular movement would increase along with the particle alignment, hence the answer is A.

I hope this helped and if it is incorrect i will edit it.