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CBSE Class 10 Answered

equal length of mg ribbon is taken in test tube a and b.if hcl is added to test tube a and ch3cooh in test tube b in equal amount and conc.in which one will the freeezing occur more and why
Asked by Debdulal | 17 Jun, 2018, 02:25: PM
answered-by-expert Expert Answer
When a meta is reacted with an acid, it forms a salt and hydrogen gas.
Hence in both cases, Mg metal reacts with acid hence hydrogen gas evolved.
 
          Mg + 2HCl → MgCl2 + H2 ↑
Mg + 2CH3COOH → Mg(CH3COO)2 + H2 ↑
 
Fizzing will occur more vigorously in test tube A containing HCl.
This happens because HCl is the stronger acid than acetic acid and hence the reaction between magnesium and HCl is faster than that of with acetic acid. 
Answered by Ramandeep | 18 Jun, 2018, 04:46: PM

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