Question

please give diagram of heating of ammonium dichromate in a dry test tube​

Answer 1

Answer:

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Explanation:

Stoichiometry of Ammonium Dichromate Decomposition

Ammonium dichromate decomposes on heating to produce nitrogen gas, water vapor (gaseous due to the temperature of the

reaction), and solid chromium(III) oxide. The skeletal net reaction is shown below, unbalanced, along with the molecular

weights of the compounds involved in the decomposition. We will weigh an amount of ammonuim dichromate, decompose it, then

calculate the mass of chromium(III) oxide that should remain. We’ll weigh the reaction product at the end of the reaction and see

how well our calculated value agrees with experiment.

(NH4)2Cr2O7(s) → N2(g) + H2O(g) + Cr2O3(s)

ammonium nitrogen water chromium(III)

dichromate oxide

g g g g

252.065 g mol

–1 28.013 g mol

–1 18.015 g mol

–1 151.990 g mol

–1

mol mol mol mol [1] [2]

[3]

Note the logical sequence of the calculations: step 1 tells us the number of moles of ammonium dichromate, step 2 uses the balanced

stoichiometric coefficients to tell us the number of moles of each product, and step 3 tells us the final mass of chromium(III) oxide.