Ions are formed when atoms lose or gain electrons in order to fulfill the octet rule and have full outer valence electron shells. When they lose electrons, they become positively charged and are named cations. When they gain electrons, they are negatively charged and are named anions.
Answer:
AgNO3
Explanation:
Considering the equation:
2 AgNO3(aq) + CuCl2(aq) ––> Cu(NO3)2(aq) + 2 AgCl(s)
2 moles of AgNO3 reacted with 1 mole of CuCl2
divide the moles by two
1 mole of AgNO3 will react with 0.5 mole of CuCl2
then
0.5 mole AgNO3 will react with 0.25 mole of CuCl2 and limiting reagent is the reagent that is consumed when the reaction is completed.
Going by the calculation above the limiting reagent is AgNO3
I hope this helps you alot and to my understanding:)