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8.12_Indigo Dye Day 1

Last updated over 4 years ago

9 questions

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Question 1

1.

Do Now: Why can't I do this lab on my own, without a parent at home?

Question 2

2.

What are the three dry (powdered) ingredients for this lab? Check all that apply

Calcium Hydroxide (slake lime)

Tea Tree Oil

Hydronium

Indigo Powder

Fructose

Potassium Permangenate 

Question 3

3.

What is the purpose of the marbles in solution?

To hydrate the solution by agitating the solution when stirred. 

To raise the water level

To break up the the insoluble indigo with sonic waves

To help retain the heat of the water

Question 4

4.

What is the purpose of heating the water?

Question 5

5.

What makes calcium hydroxide a strong base?

The hydrogen ions

The calcium ions

The hydroxide ions

The oxygen ions

Question 6

6.

What is the difference between being soluble and insoluble?

Question 7

7.

How many times more alkaline (basic) is a 10 pH solution than a 7 pH?

30x

300x

1000x

3x

Question 8

8.

Explain in detail why we are increasing the pH of the indigo vat.

Question 9

9.

Exit Ticket: What evidence will we have that the oxidation reduction reaction taking place is a chemical change?