How many grams of hydrogen gas will be liberated when 6g of magnesium ribbon dissolves...
CHEMISTRY
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How many grams of hydrogen gas will be liberated when 6g of magnesium ribbon dissolves in 500cm3 of 6M HCl? (Mg = 24, H = 1, Cl = 33.57)
- A) 1.5g
- B) 1.0g
- C) 0.5g
- D) 2.5g
Correct Answer: C) 0.5g
Explanation
When magnesium ribbon reacts with hydrochloric acid (HCl), the reaction produces magnesium chloride (MgCl?) and hydrogen gas (H?). The balanced chemical equation for this reaction is:
\(Mg + 2HCl \rightarrow MgCl_2 + H_2\)
First, we need to find the number of moles of magnesium (Mg) and hydrochloric acid (HCl) involved in the reaction. To do this, we divide the mass of magnesium by its molar mass and multiply the volume of HCl by its molarity:
Moles of Mg = mass of Mg / molar mass of Mg = 6g / 24g/mol = 0.25 mol Moles of HCl = volume of HClPost an Explanation Or Report an Error
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