Search found 1564 matches
- Tue Sep 28, 2021 8:08 am
- Forum: Chemistry forum
- Topic: Unit Conversion mol/kg to mmol/g
- Replies: 14
- Views: 8038
Re: Unit Conversion mol/kg to mmol/g
I answered already in my first post. Why do you copy this again.
- Thu Sep 23, 2021 6:59 am
- Forum: Chemistry forum
- Topic: Substituting Elements in Balancing Equations
- Replies: 1
- Views: 1707
Re: Substituting Elements in Balancing Equations
Number 1 is correct
Number 2 is like in math 1/2 + 1/3
Number 3 is similar Number 2
Number 4 HSO4 as neutral not existing. Otherwise H2SO4 has to be used.
Number 2 is like in math 1/2 + 1/3
Number 3 is similar Number 2
Number 4 HSO4 as neutral not existing. Otherwise H2SO4 has to be used.
- Thu Sep 23, 2021 6:51 am
- Forum: Chemistry forum
- Topic: Sorry, I am having a brain fart
- Replies: 1
- Views: 1561
Re: Sorry, I am having a brain fart
You will get coppersulfide CuS
The formula of coppernitrate is wrong.
The formula of coppernitrate is wrong.
- Thu Sep 23, 2021 6:50 am
- Forum: Chemistry forum
- Topic: Lead (II) nitrate to lead white pigment
- Replies: 6
- Views: 3101
Re: Lead (II) nitrate to lead white pigment
You bake lead oxide not lead metal, fumes are less, but a good hood with ventilation would be solve that Problem.
- Thu Sep 23, 2021 6:46 am
- Forum: Chemistry forum
- Topic: Do humans breathe out carbon dioxide?
- Replies: 1
- Views: 1642
Re: Do humans breathe out carbon dioxide?
So long you live, you will Inhalt oxygen and breath out CO2. Aber you die it will bestopped.
- Wed Sep 22, 2021 1:49 pm
- Forum: Chemistry forum
- Topic: Lead (II) nitrate to lead white pigment
- Replies: 6
- Views: 3101
Re: Lead (II) nitrate to lead white pigment
You add hydroxide, Filtration the precipitate and then bake it.
- Wed Sep 22, 2021 12:33 pm
- Forum: Chemistry forum
- Topic: Lead (II) nitrate to lead white pigment
- Replies: 6
- Views: 3101
Re: Lead (II) nitrate to lead white pigment
Yes you can add sodium carbonate and sodium hydroxide
- Wed Sep 22, 2021 8:03 am
- Forum: Chemistry forum
- Topic: Making Iron(II) Sulfate | Urgent
- Replies: 2
- Views: 1872
Re: Making Iron(II) Sulfate | Urgent
Take some iron nails and dissolve them in sulfuric acid. Or use iron nail to reduce iron-III
- Fri Sep 17, 2021 11:03 am
- Forum: Chemistry forum
- Topic: What is the difference between ghostwriting and freelance writing?
- Replies: 2
- Views: 5576
Re: What is the difference between ghostwriting and freelance writing?
Ghostwriting has not be used in scientific publications. The work in science hast to be published from the people who did the work. This goes down to the work on school. The homework should done from the students not from a Ghostwriter.
- Thu Sep 16, 2021 7:45 am
- Forum: Chemistry forum
- Topic: Someone here can tell us, how chlorine remove the impurity from the water..?
- Replies: 2
- Views: 4156
Re: Someone here can tell us, how chlorine remove the impurity from the water..?
Who told this. Chlorine doent remove anything. It kills bugs and virus, but the dead animals still existing. There is no removement. For that you need filtration over active carbon.
- Mon Sep 13, 2021 11:48 am
- Forum: Chemistry forum
- Topic: metal oxide and water
- Replies: 1
- Views: 4014
Re: metal oxide and water
Water (pH neutral) works like acid and neutralize a metal oxid to Hydroxide what gives alkaline solution.
And nonmetal oxide with water gives acid , because in this case water is a base.
And nonmetal oxide with water gives acid , because in this case water is a base.
- Mon Sep 13, 2021 11:40 am
- Forum: Chemistry forum
- Topic: Equivalent based questions (Valency Factors)
- Replies: 7
- Views: 7941
Re: Equivalent based questions (Valency Factors)
No your answer is correct Ratio is 1 K2Cr2O7 to 6 Na2C2O4 We have 50 ml 0.3 M Na2C2O4 what is 15 mmol So we need 1/6 of 15 mmol = 2,5 mmol K2Cr2O7 The molarity is 0,2 M so we need 2,5mmol/0,2 mmol/ml = 12,5 ml Your question we have 6×0.2M× V1=2×0.3M × 50 ml Where does the 2 comes from, it is the sam...
- Mon Sep 13, 2021 9:21 am
- Forum: Chemistry forum
- Topic: please, help be with balance
- Replies: 11
- Views: 8626
Re: please, help be with balance
Thiosulfat will be go to sulfate S2O3 2- + 10 OH- => 2 SO4 2- + 5 H2O + 8 e- Ozon will be to normal oxygen O3 + H2O + 2 e- => O2 + 2 OH- Second equation multiply by 4 4 O3 + 4 H2O + 8 e- => 4 O2 + 8 OH- Addition S2O3 2- + 10 OH- +4 O3 + 4 H2O + 8 e- => 2 SO4 2- + 5 H2O + 8 e- + 4 O2 + 8 OH- Simplef...
- Mon Sep 13, 2021 9:14 am
- Forum: Chemistry forum
- Topic: chemical reaction
- Replies: 3
- Views: 5123
Re: chemical reaction
I dont know for what the citrate is for.
The reaction is Y(NO3)3 + 3 NaOH => Y(OH)3 + 3 NaNO3
The reaction is Y(NO3)3 + 3 NaOH => Y(OH)3 + 3 NaNO3
- Mon Sep 13, 2021 9:11 am
- Forum: Chemistry forum
- Topic: Equivalent based questions (Valency Factors)
- Replies: 7
- Views: 7941
Re: Equivalent based questions (Valency Factors)
Correct answers