A sample of a chromium-containing alloy weighing 3.450 g was dissolved in acid, and all the chromium in the sample was oxidized to 2CrO42–. It was then found that 3.18 g of Na2SO3 was required to reduce the 2CrO42– to CrO2– in a basic solution, with the SO32– being oxidized to SO42–.
Write a balanced equation for the reaction of 2CrO42– with SO32- in a basic solution.
How many grams of chromium were in the alloy sample?
What was the percentage by mass of chromium in the alloy?
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Ответ:
it is d 3yz2 – 3z2 – 5y + 7
Step-by-step explanation: