Discussion List
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Secondary IV • 3yr.
Hi! I'm not sure I understand how pH works.
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And if for example I have a solution with a pH of 4 and another with a pH of 8, is the second solution twice as acidic as the first?
Thank you for your help!!
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Secondary IV • 3yr.I have a hard time understanding how why ° C is used in the thermal energy equation Q = m * c * delta T. In many chemistry exercises, we have to use Kelvin. Thank you
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Secondary IV • 3yr.Hello,
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Thank you so much!
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Secondary IV • 3yr.How do the different characteristics of the elements change in the periodic table?
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Secondary IV • 3yr.Hello, I do not understand the principle of a titration
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Secondary IV • 3yr.Hi, I don't understand half life ???
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Secondary IV • 3yr.Hello! I'm not sure if the Q in Q = m * c * ∆T means the heat or thermal energy?
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Thanks in advance :)
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Secondary IV • 3yr.Hello,
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Thank you so much!
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Secondary IV • 3yr.Hello!
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Secondary IV • 3yr.Hello!
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Secondary IV • 3yr.Hi!
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Secondary V • 3yr.How do I answer this question: how many moles of oxygen are there in 2.25 g of CO2? Thank you!
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Secondary IV • 3yr.Ok, I understand that in an acid-base neutralization, we mix an acid and a base in a solution, but I don't understand how the pH becomes neutral again after ...? Can you explain this to me please?
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Secondary IV • 3yr.Hello again :)
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thank you
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Secondary IV • 3yr.Hi!
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Secondary IV • 3yr.Hi again!
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Secondary IV • 3yr.hi!
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Why can several pH indicators be used in an experiment? How can the appropriate one be determined? Thank you :))
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Secondary IV • 3yr.Hello,
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Thank you so much!
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Secondary IV • 3yr.Helloo, what is the difference between a mole and the Avogadro number?
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Secondary IV • 3yr.Hello,
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Secondary IV • 3yr.Hello,
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Thank you so much!