Chemistry Forum

Coordination compound means a compound in which a molecule or ion formed by the bonding of metal atom or ion to two or more ligands by coordinate covalent bonds Coordinate covalent bond means a bond formed when one atom provides both electrons in a shared pair. Ligand means an ion or neutral molecul...

In potassium ferrocyanide, there are five molecules of iron and potash cations and only six molecules of cyanide anion.

Two molecules of sulfate anions are attached to cations of potassium and aluminum. That's why it is called double salt.

Which is a Double salt?
a)K2SO4Al2(SO4)3.24H2O
b)NaCl
c)K4[Fe(CN)6]
d)KCl

Answer to question c. Handerson-Hasselbalch equation = pKa + log ([conjugate base]/ [weak acid]) pH =pKa + log ([A⁻][HA]) , Hence, pH= 4.74 + log ( 0.127/0.095)= 4.84 Original Concentration of Vinegar - added concentration of 0.005M KOH =0.1 M -0.005 M KOH = 0.095 M Original concentration of sodium ...

Answer to question b.

\( pH = 4.77 + log (\frac{0.1215}{0.1005})=4.85\)

Is this answer correct?

Yes. Chemical reaction was wrongly written by me. Thanks for pointing out my mistake. I have corrected the chemical reaction now. is that correct?

Answer to question a.




\(pK_a\) for Ethanoic acid =4.77,\( pH= 4.77 + log(\frac{0.122 M }{0.1 M })=4.85\)

6.00 g acetic acid and 10.00 g sodium acetate are dissolved in enough water to make 1 L of solution. a.What is the pH of the solution? b.If 5 mL of 0.1 M HCl are added to the solution, what is the new pH? c.If instead 5 mL of 1.0 M KOH are added to the original solution, what is the new pH? I am wor...

Your answer to question e for pH of 1 M solution of KHSO3(Potassium Hydrogen Sulfite) is acidic. But my pH computation work result is different. KHSO3 + H2O ⇌ H2SO3 + KOH K_a = \frac{K_w}{K_b}= \frac{1e-14}{1.5e-2}=\frac{x\cdot x}{1 M}= 6.66e-13,x= 8.16e-7,pOH=6.088,pH=7.911 So, the 1 M solution of ...

You are correct. Answer for question a is alkaline. Following is my chemistry work. I computed the pH of 1.0 M solution of NaHS as follows:- NaHS + H2O ⇌ NaOH + H2S K_a of HS = 1.2e-13 = \frac{[NaOH])[H_2S]}{[1.0M]} Concentration of H2S is = \sqrt{1.2e-13}=[3.46e-7] We got concentration of H2S. Ioni...

All the 1 M aqueous solutions of the substances in the questions a, b, c, d, e, f are acidic.

Determine whether each of the following 1 M solutions is acidic, basic, or neutral.
a.NaHS
b.NaBr
c.NH4Ac (remember Ac = acetate)
d.KNO2
e.KHSO3
f.NaH2PO4

I am working on these questions.

If Carbon consisted of only one naturally-occurring isotopes \(-^{12}C-\),the atomic weight of Carbon would be 11.867 g. The atomic weight of Lead would be 204.716 g.

If carbon were assigned an atomic weight of 20, the atomic weight of Hydrogen and Silicon are 1.665 g and 46.76 g respectively.