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295. If a plate of pure iron is dropped into dilute sulfuric acid, then the evolution of hydrogen on it proceeds slowly and eventually ceases. However, if a zinc stick to touch the iron plate, then on the last begins a rapid release of hydrogen. Why? Which metal dissolves at the same time? Compose the electronic equations of the anodic and cathodic processes
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Solution of task 295 of Chemistry Book Shimanovich 2003
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Cumulative discount
| 200 $ | the discount is 15% |
| 100 $ | the discount is 10% |
| 50 $ | the discount is 7% |
| 20 $ | the discount is 5% |
| 10 $ | the discount is 3% |
| 5 $ | the discount is 2% |
| 1 $ | the discount is 1% |
Check your discount
Amount of purchases from the seller: $
Your discount: %
0.05 $ gift card for a positive review