It is difficult to break the ionic bonds in a compound because of the...

Chemistry

2 answers:

Alexandra [31]4 years ago

8 0

Answer: 1) C. Strong attraction between ions.

2) A. High melting points

Explanation: Ionic compounds are formed by combination of positively charged ions called cations formed by less electronegative metals and negatively charged ions called anions formed by more electronegative nonmetals.

The cations and anions with opposite charges are bonded through strong coloumbic forces and thus are difficult to break and have high melting points and thus exist as solids at room temperature.

$Na:11:[Ne]3s^1$

$Na^+:10:[Ne]$

$Cl:17:[Ne]3s^23p^5$

$Cl^-:18:[Ne]3s^23p^6$

$Na^++Cl^-\rightarrow NaCl$

mestny [16]4 years ago

6 0

The answer to the first one is C. Strong attraction between ions

The answer to the second one is A. High melting points

Hope this helps :)

You might be interested in

The easiest component of biodiversity to measure

OLEGan [10]

The easiest component of biodiversity to measure is species diversity

6 0

3 years ago

A cell was prepared by dipping a Cu wire and a saturated calomel electrode into 0.10 M CuSO4 solution. The Cu wire was attached

Rashid [163]

Answer:

(a) Cu²⁺ +2e⁻ ⇌ Cu

Explanation:

(a) Cu half-reaction

Cu²⁺ + 2e⁻ ⇌ Cu

(c) Cell voltage

The standard reduction potentials for the half-reactions are+

E°/V

Cu²⁺ + 2e⁻ ⇌ Cu; 0.34

Hg₂Cl₂ + 2e⁻ ⇌ 2Hg + 2Cl⁻; 0.241

The equation for the cell reaction is

E°/V

Cu²⁺(0.1 mol·L⁻¹) + 2e⁻ ⇌ Cu; 0.34

2Hg + 2Cl⁻ ⇌ Hg₂Cl₂ + 2e⁻; -0.241

Cu²⁺(0.1 mol·L⁻¹) + 2Hg + 2Cl⁻ ⇌ Cu + Hg₂Cl₂; 0.10

The concentration is not 1 mol·L⁻¹, so we must use the Nernst equation

(ii) Calculations:

T = 25 + 273.15 = 298.15 K

$Q = \dfrac{\text{[Cl}^{-}]^{2}}{ \text{[Cu}^{2+}]} = \dfrac{1}{0.1} = 10\\\\E = 0.10 - \left (\dfrac{8.314 \times 298.15 }{2 \times 96485}\right ) \ln(10)\\\\=0.010 -0.01285 \times 2.3 = 0.10 - 0.03 = \textbf{0.07 V}\\\text{The cell potential is }\large\boxed{\textbf{0.07 V}}$