Answer:
The answers are: (a )0.0058 M; (b) 0.00681 M; (c) 0.006912 M
Explanation:
Ionic strenght= μ= 1/2 ∑ c z²
Where c is the concentration of each ion (in M) and z is the charge of the ion. So, to calculate the ionic strenght of a solution you have to know the concentration of each ion and their charges. For this, the dissociation equilibrium is required.
a) HCl → H⁺ + Cl⁻
Conc H⁺= 0.00580 M
Conc Cl⁻= 0.00580 M
μ= 1/2 x ((Conc H⁺)(+1)²) + ((Conc Cl⁻)(-1)²
μ= 1/2 x ((0.00580 M) + (0.00580 M))
μ= 0.00580 M
b) CaBr₂ → Ca²⁺ + 2 Br⁻
Conc Ca²⁺= 0.00227 M
Conc Br⁻= 2 x 0.00227 M= 0.00454 M
μ= 1/2 ((Conc Ca²⁺)(+2)² + ((Conc Br⁻)(-1)²)
μ= 1/2 (0.00227 M (4)) + (0.00454 M)
μ= 0.00681 M
c) The solution has two dissociation equilibria:
Mg(NO₃)₂ → Mg²⁺ + 2 NO₃⁻
La(NO₃)₃ → La³⁺ + 3 NO₃⁻
Conc Mg²⁺= 0.000752 M
Conc NO₃⁻= 2 x (0.000752 M) + 3 x (0.000776 M)= 0.003832 M
Conc La³⁺= 0.000776 M
μ= 1/2 ((Conc Mg²⁺)(+2)²)+ ((Conc NO₃⁻)(-1)²) + ((Conc La³⁺)(+3)²)
μ= 1/2 (0.000752 M(4)) + (0.003832 M) + (0.000776 M)(9))
μ= 0.006912 M
Chromatography is one of them
Explanation:
Sublimation describes a solid turning directly into a gas. Melting, on the other hand, occurs when a solid turns into a liquid. Water can, under the right circumstances, sublimate, though it usually melts at temperatures above 0 degrees Celsius or 32 degrees Fahrenheit. Carbon dioxide (CO2), however, is very different. The conditions that determine whether CO2 melts or sublimates are both temperature and atmospheric pressure.
Answer:
Calculate the mass of silver phosphate produced if 30.0 grams of silver acetate completely reacts with sodium phosphate.
Answer:
The tendency of an object to resist changes in its state of motion varies with mass. Mass is that quantity that is solely dependent upon the inertia of an object. The more inertia that an object has, the more mass that it has. A more massive object has a greater tendency to resist changes in its state of motion.
