Chemistry, 14.10.2019 22:00 tylrmannon

The atomic radii of li+ and 02 ions are 0.068 and 0.140 nm, respectively. (a) calculate the force of attraction between these two ions at their equilibrium interionic separation (i. e., when the ions just touch one another). (b) what is the force of repulsion at this same separation distance? 2.19 for a k+-c- ion pair, attractive and repulsive energies ea and er, respectively, depend on the distance between the ions r, according to

Answers: 1

Show answers

Answers

Answer from: yoyo1542

$\large \boxed{\text{(a) }-5.33 \times 10^{-9} \text{ N}; \text{(b) }+5.33 \times 10^{-9} \text{ N}}$

Explanation:

a) Attractive force

To calculate the attractive force (F), we can use Coulomb's Law:

$F =k\dfrac{Q_{1}Q_{2}}{r^{2}}$

where

Q₁ and Q₂ are the charges on the ions,

r is the distance between them, and

k = the Coulomb constant

Data:

Q₁ = 1+

Q₂ = 1-

r₊ = 0.068 nm

r₋ = 0.140 nm

k = 8.988 × 10⁹ N· m²C⁻²

Calculations:

Q₁ = (+1) × 1.602 × 10⁻¹⁹ C = +1.602 × 10⁻¹⁹ C

Q₂ = (-1) × 1.602 × 10⁻¹⁹ C = -1.602 × 10⁻¹⁹ C

r = r₊ + r₋ = 0.068 nm + 0.140 nm = 0.208 nm = 0.208 × 10⁻⁹ m

$\begin{array}{rcl}F & = & 8.988 \times 10^{9}\times\dfrac{1.602 \times 10^{-19} \times (-1.602) \times 10^{-19}}{(0.208 \times 10^{-9})^{2}}\\\\& = & \mathbf{-5.33\times 10^{-9}} \textbf{ N}\\\end{array}\\\text{The attractive force between the two ions is $\large \boxed{\mathbf{-5.33 \times 10^{-9}} \textbf{ N}}$}$

The negative sign shows that the ions are attracted to each other.

(b) Repulsive force

The equilibrium position is reached when the ions just touch each other. If they come any closer, the nuclear repulsions will outweigh the Coulombic attraction.

Thus, the repulsive force is equal and opposite to the attractive force.

$\text{The repulsive force is $\large \boxed{\mathbf{+5.33\times 10^{-9}} \textbf{ N}}$}$

The atomic radii of li+ and 02 ions are 0.068 and 0.140 nm, respectively. (a) calculate the force of

Answer from: Quest

In meteorology, a cloud is an aerosol consisting of a visible mass of minute liquid droplets, frozen crystals, or other particles suspended in the atmosphere of a planetary body. nephology is the science of clouds, which is undertaken in the cloud physics branch of meteorology.cirrus clouds usually describe clouds high in the atmosphere that can include wispy clouds, typically with ice crystals. variations include cirrus, cirrocumulus and cirrostratus as defined by the cloud's position in the atmosphere.layered stratus clouds have both flat tops and bases, and can appear as if they take up the whole sky, stretching from horizon to horizon. other combinations and variations include stratus, stratocumulus, nimbostratus and altostratus.cumulus clouds often pile up in multiple layers of the atmosphere, representing clouds that develop vertically. cumulus clouds often look like pillars with anvil-type tops or columns of clouds stacked vertically. variations include cumulus, cumulus-congestus, cumulonimbus and altocumulus.

Answer from: Quest

Ithink is a because if say increased in electronegativity