6.Based on the activity series, A metal system which occurring above the given element, displaces the element from the aqueous solution containing its own ions. The single displacement reaction does not occur is
SnBr2(aq) + Cu(s) -----> CuBr2(aq) + Sn(s)
7. A reaction in which both oxidation-reduction takes place simultaneously is called redox reaction.
Cu(s) + 2AgNO3(aq) -----> Cu(NO3)2(aq) + 2Ag(s)
8. The number of moles of Ca(NO3)2= molarity * volume = 2*0.3 = 0.60 moles
i. e. The solution contains 0.60 moles of Ca(NO3)2, 0.60 moles of Ca2+ ions and 1.20 moles of NO3- ions
The solution contains 3.60 moles of O atoms , 1.20 moles of N atoms.
The number of Ca2+ ions present in the 2.0 solution are 0.60 *6.023*1023 = 3.61 *10^23 ions
Therefore, the number of Ca2+ ions present in the 1.0 solution are 0.60 *6.023*1023 /2= 1.805 *10^23 ions.
Incorrect statement : 1.0 of solution contains 3.61 *10^23 Ca2+ ions is wrong
10. According to dilution law,
M1V1=M2V2 ===> 9*V1 = 2.75*350 =======> V1 = 107 mL
The 107 mL of 9.0 M solution of MgCl2 must be diluted in order to get 350 mL of 2.75 M solution
6. Based on the activity series, which single displacement reaction will not occur? Mg(s) + 2HCl(aq)...
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