Testing for nickel ion, Ni2+: this video shows all details about testing for nickel ion, Ni2+. identification of Nickel ion, Ni2+, is very easy, you have to follow all details in this video. • Testing for Calcium ion, Ca2+ • Test for magnesium ion, Mg2+ • Test for Nickel ion, Ni2+ • Test for cobalt two ion, Co2+ • Test for copper ion, Cu2+ • Testing for iron three ion, Fe3+ • Testing for iorn(II) ion, Fe2+ • Testing for Barium ion, Ba2+ • Testing Zinc ion • Testing lead ion • Video • Testing tin ion