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ivolga24 [154]
3 years ago
10

Why does yellow iodide turn blue when it touches starch?

Chemistry
1 answer:
KIM [24]3 years ago
4 0

Amylose in starch is responsible for the formation of a deep blue color in the presence of iodine. The iodine molecule slips inside of the amylose coil. ... This makes a linear triiodide ion complex with is soluble that slips into the coil of the starch causing an intense blue-black color. I got this from google for a more detailed response, and hope this helps!

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What is the approximate value of the equilibrium constant, k n, for the neutralization of acetic acid withsodium hydroxide, show
NikAS [45]
You are given the neutralization of acetic acid with sodium hydroxide. Also, you are given the k for acetic acid, which is 1.8 x 10⁻⁵. You are asked to find the<span> approximate value of the equilibrium constant, kn, for the neutralization. We will have a reaction of both acetic acid and sodium hydroxide.

CH</span>₃COOH + NaOH → CH₃COONa + H₂O
which comes from
CH₃COOH → CH₃COO⁻ + H⁺
H⁺ + OH⁻ → H₂O<span>

</span>The k for water is always 1.0 x 10¹⁴. The Ksp for the reaction will be
<span>
Ksp = [</span>CH₃COOH][H₂O]
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<span>Ksp = 1.8 x 10</span>⁹
5 0
3 years ago
what two variables is acceleration dependent on? what is the relationship between these variables and acceleration?
Citrus2011 [14]
Acceleration (change of movement) of an object is dependent on the net force acting on it and its mass.

The relationship between acceleration (a), force (f) and mass (m) is given by the Second Lay of Newton: f = m * a.

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I hope this help you.


8 0
3 years ago
. A 500.0 mL buffer solution contains 0.30 M acetic acid (CH3COOH) and 0.20 M sodium acetate (CH3COONa). What will the pH of thi
julia-pushkina [17]

Answer:

pH = 4.57

Explanation:

pH = pKa + log ([OAc⁺]/[HOAc])

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[OAc⁻] = 0.20M

[HOAc] = 0.30M

pH = 4.74 + log([0.20]/[0.30]) = 4.47 + (-0.17) = 4.57

7 0
3 years ago
Determine how many significant figures are in each measurement.(9pts)
Strike441 [17]
1. 3 significant figures
2. 5 significant figures
3. 3 significant figures
4. 4 significant figures
5. 5 significant figures
6. 2 significant figures
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5 0
3 years ago
There are some cells that do not have DNA. <br> O True<br> O false
raketka [301]

Answer:

false

Explanation:

8 0
3 years ago
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