Search found 1542 matches
- Sat Aug 28, 2021 7:49 am
- Forum: Chemistry forum
- Topic: Final temperature
- Replies: 4
- Views: 4125
Re: Final temperature
Why do you mix kJ and kcal, it is the same thing only different unit.
- Fri Aug 27, 2021 11:18 am
- Forum: Chemistry forum
- Topic: calculation of neutralization heat
- Replies: 8
- Views: 8437
- Fri Aug 27, 2021 10:41 am
- Forum: Chemistry forum
- Topic: Help
- Replies: 3
- Views: 3684
Re: Help
You have to express the MnO2 in first equation with the second equation .
Its like 1/2 + 1/3 = ?
Its like 1/2 + 1/3 = ?
- Fri Aug 27, 2021 10:37 am
- Forum: Chemistry forum
- Topic: calculation of neutralization heat
- Replies: 8
- Views: 8437
Re: calculation of neutralization heat
You have to calculate how much mol you have with the datas given. Do you you have 1:1 or something else. But you have to get the ratio 1:1.
- Fri Aug 27, 2021 7:53 am
- Forum: Chemistry forum
- Topic: calculation of neutralization heat
- Replies: 8
- Views: 8437
Re: calculation of neutralization heat
The unit of heat released is kJ/ mol. So what is the maximum mol what react according NaOH + HCl => NaCl + H2O ?
- Tue Aug 24, 2021 4:12 am
- Forum: Chemistry forum
- Topic: Calculation of standard molar enthalpy of formation
- Replies: 2
- Views: 3419
Re: Calculation of standard molar enthalpy of formation
You calculate for 4C + 6H2 => 2 C2H6 -167 kJ/mol
But you can devide to 2C + 3H2 => C2H6 -83,55kJ/ mol ~ - 84 kJ/ mol
But you can devide to 2C + 3H2 => C2H6 -83,55kJ/ mol ~ - 84 kJ/ mol
- Tue Aug 24, 2021 1:40 am
- Forum: Chemistry forum
- Topic: Questions on chemical structures of compound or elements
- Replies: 3
- Views: 4156
Re: Questions on chemical structures of compound or elements
Explain why should Li+ and Mg 2+ have more electrons as protons?
Of course 1b iscorrect.
Of course 1b iscorrect.
- Mon Aug 23, 2021 11:54 pm
- Forum: Chemistry forum
- Topic: Questions on chemical structures of compound or elements
- Replies: 3
- Views: 4156
Re: Questions on chemical structures of compound or elements
1 d is wrong, the others are correct.
- Mon Aug 23, 2021 11:50 pm
- Forum: Chemistry forum
- Topic: Question based on Titration and pH computation
- Replies: 9
- Views: 8046
- Mon Aug 23, 2021 7:40 am
- Forum: Chemistry forum
- Topic: Flavouring unflavoured Essential Amino Acids / BCAAs
- Replies: 3
- Views: 3788
Re: Flavouring unflavoured Essential Amino Acids / BCAAs
Sorry we dont discuss for self made pharmacy.
- Mon Aug 23, 2021 2:48 am
- Forum: Chemistry forum
- Topic: Flavouring unflavoured Essential Amino Acids / BCAAs
- Replies: 3
- Views: 3788
Re: Flavouring unflavoured Essential Amino Acids / BCAAs
What is the topic, for what you need the Amino acids.
- Mon Aug 23, 2021 2:45 am
- Forum: Chemistry forum
- Topic: 4-Nitrophthalonitrile Supplier
- Replies: 1
- Views: 3119
Re: 4-Nitrophthalonitrile Supplier
No commercials here.
- Mon Aug 23, 2021 2:45 am
- Forum: Chemistry forum
- Topic: Question based on Titration and pH computation
- Replies: 9
- Views: 8046
Re: Question based on Titration and pH computation
Compare the theoretical consumption with the real one.
Calculate the moles you used and the moles of the NaOH react.
Calculate the moles you used and the moles of the NaOH react.
- Sun Aug 22, 2021 3:39 am
- Forum: Chemistry forum
- Topic: Making Potassium Citrate from Citric Acid From Lemons
- Replies: 4
- Views: 4218
Re: Making Potassium Citrate from Citric Acid From Lemons
Carbonate will be destroyed by acid to CO2 and water. So this can be used. Hydroxid get neutralization to water. All others have not effekt.
- Sat Aug 21, 2021 3:24 am
- Forum: Chemistry forum
- Topic: Making Potassium Citrate from Citric Acid From Lemons
- Replies: 4
- Views: 4218
Re: Making Potassium Citrate from Citric Acid From Lemons
Potassium hydrogen carbonate, potassium carbonate and potassium hydroxide can be used.