AIM.will THE colour OF IODINE SOLUTION change TO BLUE-BLACK WHEN WE ADD THE STARCH POWDER ON IT? 1.LIST TWO PLANNING STEP FOR THIS INVESTIGATION. 3
.formulate THE HYPOTHESIS FOR THIS INVESTIGATION.
1. Planning Steps for Investigation:
- Step 1: Gather the necessary materials for the investigation, including iodine solution, starch powder, and containers for mixing.
- Step 2: Prepare the solutions by mixing the iodine with water to make the iodine solution and ensuring the starch powder is finely ground.
2. Hypothesis for Investigation:
- The hypothesis for this investigation would be that when starch powder is added to iodine solution, the color of the solution will change to blue-black. This assumption is based on the known property of iodine acting as a starch indicator, producing a characteristic blue-black color when combined with starch molecules.
To investigate whether the color of iodine solution will change to blue-black when we add starch powder to it, you need to follow a proper investigation process. Here are two planning steps you can take for this investigation:
1. Gather Materials and Equipment:
- Iodine solution
- Starch powder
- Test tubes or containers
- Pipettes or droppers
- Stirring rod
2. Design the Experiment:
- Identify the variable: The variable in this investigation would be the presence or absence of starch powder.
- Control group: Start by adding iodine solution to one container or test tube. This will act as your control group.
- Experimental group: In a separate container or test tube, add iodine solution and starch powder. This will be the experimental group.
- Repeat the experiment: Repeat both the control and experimental groups multiple times to ensure accurate results and statistical significance.
Now, let's formulate a hypothesis based on the observation and knowledge:
Hypothesis: If starch powder is added to iodine solution, then the color of the solution will change to blue-black. This hypothesis is based on the known reaction between iodine and starch, which results in the formation of a blue-black complex. Therefore, the expectation is that the presence of starch will cause the color change in the iodine solution.