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In the market of Buxue Cereals, there are often tiny particles of reductive iron powder. The iron powder reacts with hydrochloric acid in human gastric juice to transform into ferrous salt, which plays the role of Buxue______ ．
The process is the reaction of iron powder with hydrochloric acid, iron reacts with dilute hydrochloric acid to produce ferrous chloride and hydrogen. The equation is Fe + 2HCl FeCl2 + H2 so the answer is: Fe + 2HCl FeCl2 + H2
Existing reactants: silver nitrate solution zinc granule calcium carbonate water sodium hydroxide solution quicklime hydrochloric acid write chemical reaction equation (reusable)
1 displacement reaction without gas formation
2 compound reaction
3 decomposition reaction
4. Double decomposition reaction with gas formation
5 neutralization reaction
1 displacement reaction without gas formation
Zn+AgNO3=ZnNO3+Ag
2 compound reaction
CaO+H2O=Ca(OH)2
3 decomposition reaction
High temperature = CaO + 3
4. Double decomposition reaction with gas formation
CaCO3+2HCl=CaCl2+H2O+CO2↑
5 neutralization reaction
NaOH+HCl=NaCl+H2O
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