A. The most reactive Non-metals are found at the top of Group 17 (Halogens) in the form of Fluorine and Chlorine
Answer:
B = 0.10 M of AlCl₃
Explanation:
A = 0.10 M NaCl
NaCl → Na⁺ + Cl⁻
sodium chloride dissociate into sodium and chlorine ions. The one mole of NaCl produced on mole of Na⁺ and one mole of Cl⁻, so concentration of chloride ions will be 0.10 M.
B = 0.10 M of AlCl₃
AlCl₃ → Al³⁺ + 3Cl⁻
AlCl₃ dissociate into aluminium cation and chlorine anion. one mole of AlCl₃ dissociate into one mole of Al³⁺ and three mole of Cl⁻.
so concentration of chloride ion in 0.10 M solution is
0.10 × 3 = 0.3 M
C = 0.10 M MgCl₂
MgCl₂ → Mg²⁺ + 2Cl⁻
MgCl₂ dissociate into one mole of Mg²⁺ and two mole of Cl⁻.
so concentration of chloride ions in 0.10 M solution of MgCl₂ is,
2× 0.10 M = 0.20 M
d = 0.05 M CaCl₂
CaCl₂ → Ca²⁺ + 2Cl⁻
CaCl₂ dissociate into one mole of Ca²⁺ and two mole of Cl⁻, So concentration of chloride ions in 0.05 M CaCl₂ is
2× 0.05 = 0.1 M
Answer:
If you look at the night sky different times of the year you see different constellations. This change is due to the motion of the Earth in its orbit around the Sun. Each day a few stars are visible in the east that were not visible the night before.
Explanation: