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2 years ago

Answer the following questions using the results of the following Unknown Solution Analysis:

Chemistry

1 answer:

STALIN [3.7K]2 years ago

6 0

Answer:

(a). strontium iodide.

(b). SrI2.

Explanation:

This question wants to test our knowledge on qualitative part of chemistry practical.

The first part is flame test which is a physical test. The flame test that was done on the com gave red flame.

Deduction: This confirms the presence of Strontium and Calcium.

The next thing is the chemical tests.

(1). Unknown + ammonium carbonate: gives white precipitate (ppt.).

Deduction: presence of Calcium and Strontium ions

(2). Unknown + Ammonium phosphate - white ppt.

Deduction: presence of Calcium and Strontium ions.

(3). Unknown sample + ammonium sulfate - white ppt.

Deduction: presence of Strontium ion confirmed.

(3). Halide test: purple hexane layer.

Deduction: shows the presence of Iodine.

Therefore, the final conclusion can be made as;

(a). The name of the chemical compound is strontium iodide.

(b). The chemical formula for the compound is SrI2.

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Explanation:

Balance equation for the formation of ammonia from H2 gas.

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Given

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number of moles = $\frac{mass}{atomic mass of 1 mole}$

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in 1 bottle of windex there are 3 moles of ammonia 0r 51 grams of ammonia.

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3 moles of hydrogen reacted to form 2 moles of ammonia

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x = 4.5 moles of hydrogen will be required.

to convert moles into gram formula used:

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