Intro video for mars coaching center porur

logo of mars coaching centre

This is my institute mars coaching center in porur we offer good coaching for all board exam and neet iit-jee exam with experienced faculty. 

action of acid

Reaction of dilute Acid with metals: -

Copper

2Cu+4HCl+O₂ (air)                        2CuCl₂ + 2H₂O

2Cu + 2H₂So₄+ O₂ (air)                      2Cu So₄ + 2H₂O

 

3Cu + 8HNO₃                         3Cu (NO₃)₂ + 2NO    + 4H₂O

Chromium

Cr + 2HCl                       CrCl₂ + H₂

 

Cr + H₂So₄                                CrSo₄ + H₂

Zinc

Zn + 2HCl                       ZnCl₂ + H₂

 

Zn + H₂So₄                           ZnSo₄ + H₂

 

4Zn + 10HNO₃ (dil)                   4Zn (NO₃)₂ + N₂O    + 5H₂O

4Zn + 10HNO₃ (Very dil)                     4Zn (NO₃)₂ + NH₄NO₃ + 3H₂O

Silver

3Ag + 4HNO₃                            3Ag NO₃ + NO   + 2H₂O

Gold

2Au + 9HCl + 3HNO₃                      2AuCl₃ + 6H₂O + 3NOCl

Reaction of concentrated Acid with metals: -

Copper

Cu + 2H₂SO₄                         Cu So₄ + SO₂   + 2H₂O

 

Cu + 4HNO₃                           Cu (NO₃)₂ + 2NO₂    + 2H₂O

Chromium

2Cr + 6H₂SO₄                           Cr₂(So₄)₃ + 3SO₂  + 6H₂O

Zinc

Zn + 2H₂So₄                         ZnSo₄ + SO₂   + 2H_2­O

Silver

Ag + 2HNO₃                   Ag NO₃ + NO₂   + H₂O

 

2Ag + 2 H₂SO₄                       Ag₂SO₄ + SO₂   + 2H₂O