Search found 257 matches
- Wed Apr 14, 2021 7:37 am
- Forum: Chemistry forum
- Topic: Coordination compound
- Replies: 7
- Views: 2578
Re: Coordination compound
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...
- Wed Apr 14, 2021 5:07 am
- Forum: Chemistry forum
- Topic: Coordination compound
- Replies: 7
- Views: 2578
Re: Coordination compound
In potassium ferrocyanide, there are five molecules of iron and potash cations and only six molecules of cyanide anion.
- Wed Apr 14, 2021 12:30 am
- Forum: Chemistry forum
- Topic: Coordination compound
- Replies: 7
- Views: 2578
Re: Coordination compound
Two molecules of sulfate anions are attached to cations of potassium and aluminum. That's why it is called double salt.
- Tue Apr 13, 2021 8:03 am
- Forum: Chemistry forum
- Topic: Coordination compound
- Replies: 7
- Views: 2578
Coordination compound
Which is a Double salt?
a)K2SO4Al2(SO4)3.24H2O
b)NaCl
c)K4[Fe(CN)6]
d)KCl
a)K2SO4Al2(SO4)3.24H2O
b)NaCl
c)K4[Fe(CN)6]
d)KCl
- Fri Apr 09, 2021 11:22 pm
- Forum: Chemistry forum
- Topic: Finding out pH of the solution
- Replies: 8
- Views: 2994
Re: Finding out pH of the solution
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 ...
- Fri Apr 09, 2021 9:38 am
- Forum: Chemistry forum
- Topic: Finding out pH of the solution
- Replies: 8
- Views: 2994
Re: Finding out pH of the solution
Answer to question b.
\( pH = 4.77 + log (\frac{0.1215}{0.1005})=4.85\)
Is this answer correct?
\( pH = 4.77 + log (\frac{0.1215}{0.1005})=4.85\)
Is this answer correct?
- Fri Apr 09, 2021 12:54 am
- Forum: Chemistry forum
- Topic: Finding out pH of the solution
- Replies: 8
- Views: 2994
Re: Finding out pH of the solution
Yes. Chemical reaction was wrongly written by me. Thanks for pointing out my mistake. I have corrected the chemical reaction now. is that correct?
- Thu Apr 08, 2021 10:14 pm
- Forum: Chemistry forum
- Topic: Finding out pH of the solution
- Replies: 8
- Views: 2994
Re: Finding out pH of the solution
Answer to question a.
\(pK_a\) for Ethanoic acid =4.77,\( pH= 4.77 + log(\frac{0.122 M }{0.1 M })=4.85\)
\(pK_a\) for Ethanoic acid =4.77,\( pH= 4.77 + log(\frac{0.122 M }{0.1 M })=4.85\)
- Wed Apr 07, 2021 7:09 am
- Forum: Chemistry forum
- Topic: Finding out pH of the solution
- Replies: 8
- Views: 2994
Finding out pH of the solution
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...
- Tue Apr 06, 2021 7:19 am
- Forum: Chemistry forum
- Topic: pH determination problems
- Replies: 7
- Views: 2601
Re: pH determination problems
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 ...
- Mon Apr 05, 2021 9:48 am
- Forum: Chemistry forum
- Topic: pH determination problems
- Replies: 7
- Views: 2601
Re: pH determination problems
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...
- Mon Apr 05, 2021 5:15 am
- Forum: Chemistry forum
- Topic: pH determination problems
- Replies: 7
- Views: 2601
Re: pH determination problems
All the 1 M aqueous solutions of the substances in the questions a, b, c, d, e, f are acidic.
- Sat Apr 03, 2021 7:29 am
- Forum: Chemistry forum
- Topic: pH determination problems
- Replies: 7
- Views: 2601
pH determination problems
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.
a.NaHS
b.NaBr
c.NH4Ac (remember Ac = acetate)
d.KNO2
e.KHSO3
f.NaH2PO4
I am working on these questions.
- Sat Apr 03, 2021 5:36 am
- Forum: Chemistry forum
- Topic: Atomic weight question 2
- Replies: 3
- Views: 1624
Re: Atomic weight question 2
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.
- Fri Apr 02, 2021 11:32 pm
- Forum: Chemistry forum
- Topic: Atomic weight question
- Replies: 3
- Views: 1552
Re: Atomic weight question
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.