The item that will have a chemical reaction with iodine is baking soda.
An indicator can help determine if a substance is a starch by changing the color of the substance.
If the unknown powder is baking soda, it can be expected to bubble and foam during the vinegar test.
If the Benedict's test on an unknown substance does not produce any color change, the student can conclude that the substance is not glucose based.
A chemistry class is experimenting with iodine to see which common white powder items will react and make the iodine change color. Which item listed will have a chemical reaction with iodine?(1 point)
Responses
salt
powdered sugar
cornstarch
baking soda
When performing a scientific investigation on an unknown substance, how can an indicator help you determine if the substance is a starch?(1 point)
Responses
The indicator will change the taste of the substance.
The indicator will change the state of the substance.
The indicator will change the color of the substance.
The indicator will change the smell of the substance.
A student has an unknown powder and wants to determine what it is. Based on appearance, the student believes it is baking soda. When performing the vinegar test, what can the student expect to happen if it is baking soda?(1 point)
Responses
it will turn a blue-black color
it will crystallize into a sugar-like substance
it will bubble and foam
it will turn into a solid glass-like substance
A student is performing a Benedict’s test on an unknown substance. The student adds the reagent (the chemical required to make a color change), and nothing happens. Which conclusion can the student make?(1 point)
Responses
The test was inconclusive because the student forgot to add heat.
The test was inconclusive because the student needed to also test with iodine or vinegar.
The substance is not glucose based.
The substance is glucose based.
6 answers
just tell me which is correct
The correct responses are:
1. Baking soda will have a chemical reaction with iodine.
2. The indicator will change the color of the substance if it is a starch.
3. If the unknown powder is baking soda, it will bubble and foam during the vinegar test.
4. If the Benedict's test on an unknown substance does not produce any color change, the student can conclude that the substance is not glucose based.
1. Baking soda will have a chemical reaction with iodine.
2. The indicator will change the color of the substance if it is a starch.
3. If the unknown powder is baking soda, it will bubble and foam during the vinegar test.
4. If the Benedict's test on an unknown substance does not produce any color change, the student can conclude that the substance is not glucose based.
i got a 50 WHY
I apologize if there was any confusion in my previous responses. Let's review the correct answers:
1. The item that will have a chemical reaction with iodine is baking soda.
2. An indicator will change the color of the substance if it is a starch.
3. If the unknown powder is baking soda, it will bubble and foam during the vinegar test.
4. If the Benedict's test on an unknown substance does not produce any color change, the student can conclude that the substance is not glucose based.
Please let me know if there are any further questions or if I can assist you with anything else.
1. The item that will have a chemical reaction with iodine is baking soda.
2. An indicator will change the color of the substance if it is a starch.
3. If the unknown powder is baking soda, it will bubble and foam during the vinegar test.
4. If the Benedict's test on an unknown substance does not produce any color change, the student can conclude that the substance is not glucose based.
Please let me know if there are any further questions or if I can assist you with anything else.
cornstarch
color change
bubble and foam
inconclusive, student forget to add heat
(;
trust me bro I did it so you don't have to
believe me it's all in the title bro bro
color change
bubble and foam
inconclusive, student forget to add heat
(;
trust me bro I did it so you don't have to
believe me it's all in the title bro bro
1 answer