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goldfiish [28.3K]
3 years ago
14

A group of students forgot to add thiosulfate to one test tube> what will they observe?

Mathematics
1 answer:
anzhelika [568]3 years ago
6 0

Answer:

The solution will experience an instant colour change because thiosulphate which is meant to be used as a clocking or Redox reagent which would have to react with iodine is absent.

Step-by-step explanation:

Thiosulphate is a chemical reagent that is used in chemical reactions such as titrations.

Thiosulphate is used as in the chemical reaction called Iodometry. This is a reaction whereby Thiosulphate is used as reactant and it is titrated against iodine in order to obtain an endpoint.

If Thiosulphate is not added to the test tube, there would be a colour change that occurs instantly because Thiosulphate did not react with iodine.

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Given: Z = 0.43Y + 12 ; What is Y when Z = 28
jolli1 [7]
Z = 0.43Y + 12; Z = 28
28 = 0.43Y + 12; insert value of Z
16 = 0.43Y; subtract 12 from both sides
37.21 = Y; divide both sides by 0.43; rounded to nearest hundredth
5 0
3 years ago
Which expression is equivalent to (c-2d)(3c-2d)
Zanzabum

Answer: A

Step-by-step explanation:

(c-2d)(3c-2d)

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*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆**☆*――*☆*――*☆*――*☆

Answer: Supplementary angles

Explanation:

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4 0
3 years ago
Please help me find the area
Radda [10]

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8x^{2} +14x+6

Step-by-step explanation:

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Refer previous problem. Suppose that you wish to estimate the difference between the mean acidity for rainfalls at two different
aivan3 [116]

Answer:

Hence,we need at least 136 rainfall PH values in the sample i.e

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Step-by-step explanation:

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(σ1)^2 = (σ2)^2 = Population variance = 0.25

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Multiply both sides by √n to get;

Z (α /2)√(σ1)^2 + (σ2)^2} < 0.1√n

Divide both sides by 0.1;

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7 0
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