Two properties of Iodine are:
1) Iodine is located in group VIIA of the periodic table, it is a halogen and has 7 valence electrons, therefore it is a very reactive element and tends to form bonds with elements of group IA that have a valence electron.
2) Due to its high electronegativity, it tends to steal electrons, so it is an oxidizing element, it is solid at room temperature, opaque and has a purple-gray color in the solid state and violet in the gaseous state.
In summary, two properties of iodine will be:
1) Very reactive element
2) Oxidizing element
Other properties that you can add are:
3) solid at room temperature.
4) Opaque
Answer:
Both K+ and NO3- concentrations are halved
Explanation:
Since the reaction is
K₂Cr₂O₇ + Pb(NO₃)₂ 2K(NO₃) + <u>PbCr</u>₂<u>O</u>₇
knowing that K+ and NO3- are spectator ions, their concentration do not change due to reaction but it will change due to the mixing of volumes of the reactants since we are mixing volumes of different concentrations.
for K+ initially we have:
c K+ initial = 0.25 M
c K+ final = n/ V = C i * Vin / Vfinal = 0.25 M * 100 ml / 200 ml = 0.125 M
the 200 ml comes from mixing the 100 ml of Pb(NO₃)₂ and 100 ml of K₂Cr₂O₇ ( assuming that the volume of the precipitate is insignificant relative to the solution , it does not occlude a significant portion of the saturated solution and assuming that any volume contraction/expansion due to non ideal behaviour of the solution is negligible)
the same happens with NO3- ,therefore its concentration is also halved
Answer: Charles's law, Avogadro's law and Boyle's law.
Explanation:
Boyle's law is: at constant temperature PV = constant
Charles law is: at constant pressure V/T = constant
Avogadro's law is: at constant pressure ant temperature, equal volume of gases contain equal number of moles: V/n = constant
Ideal gas law: PV/nT = constant => PV = nT*constant = PV = nTR