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Why a single covalent bond is stronger than a single ionic bond?

As explained by my teacher a single ionic bond is always weaker than a single covalent bond. Due to lattice formation the ionic compounds have high melting point and boiling point. Is it beacuse ...
6 views

combination of H2 and O2 after electrolysis

if we electrolysis water in a closed container H2 and O2 is formed, now as the container is closed both gases remain there when the electrolysis stop and water cool down will h2 and o2 remain in the ...
12 views

Finding the pH of a buffer from the scratch without the Henderson Hasselbalch equation

I found this question on the internet that said: Find the pOH of the solution obtained by mixing 0.1 moles of $\mathrm{NH_4 OH}$ $(K_b = 10^{-5})$ and 0.1 moles of $\mathrm{(NH_4)_2 SO_4}$ in a 500mL ...
14 views

Can any one list the set of fundamental unsolved questions in coordination chemistry? [closed]

I am interested in unsolved problems in coordination chemistry, from particular cases to the most fundamental phenomena. Thanks in advance
16 views

What does fractional notation represent in molecular formulas such as SiO4/2 or H2SiO2/2?

I'm going through some papers about HSQ (hydrogen silsesquioxane) and keep seeing this fractional notation being used: HSiO3/2 , SiO4/2 , H2SiO2/2 , H3SiO1/2. Example paper. I understand that the ...
15 views

Why is ethanol, water and amonium needed for DMG to react with nickel?

I had this question on a test and I'm unsure on why ethanol is required for the reaction. I understand that you need the ammonia and water to make oxonium ions needed for the reaction to occur. We had ...
14 views

Is the effective nuclear charge only defined for valence electrons?

I've just been taught about the effective nuclear charge and screening effect in school. I'd like to ask and confirm if the z is only defined for valence electrons, if not then why don't we consider ...
24 views