Complete and balance the following chemical equations :NaOH(aq)+Zn(s)
Answers
Answer:
Balance the equation in aqueous basic solution: Zn(s) + NaOH(aq) --> Na_2Zn(OH)_4(aq) + H_2(g)
WHEN ZINC REACTS WITH HOT AND CONC. NAOH IT FORMS SODIUM ZINCATE AND LIBERATES HYDROGEN GAS :
2NaOH(aq)+Zn---->Na2ZnO2(aq)+H2(g)
Zn is a metal that can dissolve in aqueous solutions so
NaOH is a base which in its aqueous solution makes Na+ and OH- IONS
WHEN zinc reacts with OH IONS its forms Zn hydroxide which is basic in nature
this zn hydroxide then reacts with other molecule of NaOH or (Na+ OH- )IONS
SINCE Zinc hydroxide is amphoteruc in nature it reacts with the base tio form sodium zincate and hydrogen gas is liberated
IT IS A REACTION OF METAL WITH BASE
HOWEVER ALL METALS CANNOT REACT IN THE SAME WAY
ALUMINIUM IS ANOTHER EXAMPLE OF THIS
2Al+2NaOH+2H2O--->2NaOH+3H