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Q: Why does manganese and magnesium react with nitric acid to evolve hydrogen gas?
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Why hydrogen is liberated when magnesium react with dilute nitric acid unlike other metals where hydrogen is not evolved?

This may due to Magnesium metal has high reactivity and concentration of nitric acid is dilute, thus magnesium reacts with H+ in water/ in nitric acid to give hydrogen


What does Magnesium combined with nitric acid make?

Magnesium (Mg) + Nitric Acid (HNO3) ---> Magnesium Nitrate (MgNO3) + Hydrogen gas (H) + Heat


Which 2 metals can displace hydrogen from dilute nitric acid?

magnesium and manganese Mg(s) + 2 HNO3(aq) → Mg(NO3)2(aq) + H2(g)


What is the word equation for magnesium carbonate reacting with nitric acid?

magnesium nitrate + water + hydrogen


What gas is formed when dilute nitric acid reacting with magnesium?

Magnesium will react with nitric acid and most other acids to produce hydrogen gas.


Does magnesium and nitric acid produce carbon dioxide?

No; it prodces hydrogen gas instead: Magnesium is far above hydrogen in the electromotive series.


Explain the reaction between nitric acid and manganese?

Manganese and magnesium are metals. They have a low electronegativity, which is to say, they have a weak grip on their valance electrons, and can easily lose them. Hydrogen is not as metallic - it is sort of halfway between a metal and a nonmetal although under normal conditions no one would ever mistake it for a metal - and it has a higher electronegativity; it holds on to its valance electron more strongly. Hence, the manganese and magnesium donate their electrons to the hydrogen ions which then become hydrogen gas, leaving behind the manganese and magnesium in the form of ions. The electrons simply migrate to the element that attracts them more strongly.


Why is nitric acid in the dilute form not used in the laboratory preparation of hydrogen from metals?

It is because nitric acid is a strong oxidising agent (because it decomposes to yield nascent oxygen as:2HNO3 →2NO2 + H2O + [O])and it oxidises the hydrogen formed to water.Only 1% dilute and cold nitric acid reacts with magnesium and manganese to liberate Hydrogen gas.


What is the word equation for the reaction between magnesium and nitric acid?

nitric acid + magnesium carbonate → salt + water + carbon dioxide


What salt is produced when nitric acid reacts with magnesium?

Magnesium reacts with Nitric Acid to produce Magnesium nitrate plus Hydrogen gas. Mg + 2HNO3 ----> Mg(NO3)2 + H2


What is magnesium nitrate made of?

You can make magnesium nitrate by mixing nitric acid and magnesium metal. However, the reaction creates heat and releases hydrogen gas. Depending on the percentage of nitric acid and the purity of the magnesium, depends on how much heat and how much hydrogen you'll get. I would personally be careful if trying this due to that when you have heat and hydrogen gas, you will probably get a flame. (maybe an explosion) So be careful if you are trying this experiment!


How do you write a reaction between magnesium metal and solution of nitric acid?

This is a single displacement reaction, so Mg (s) + HNO3 --> H (g) + Mg(NO3)2 Magnesium (solid) and Nitric Acid yields Hydrogen (gas) and Magnesium Nitrate