All Questions
Tagged with ionic-compounds experimental-chemistry
11
questions
0
votes
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answer
597
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Impurities in household baking soda
For a long time, I have been using store bought baking soda (with sodium bicarbonate as the sole ingredient listed) as the sodium bicarbonate in my (qualitative) home experiments, but recently I ...
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-3
votes
1
answer
490
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How do I calculate weight percent of BaCl2
A $\pu{0.1036 g}$ sample containing only $\ce{BaCl2}$ and $\ce{NaCl}$ is dissolved in $\pu{50 mL}$ of distilled water. Titrating with $\pu{0.07916 M}$ $\ce{AgNO3}$ requires $\pu{19.46 mL}$ to reach ...
3
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1
answer
1k
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What changes does zinc chloride undergo when ‘fusing’ on an atomic level? How does this influence reactivity?
I have been using a reaction with an organozincate starting material. This zincate is freshly prepared from zinc chloride and a Grignard reagent. The experimental procedure ‘handed down’ from more ...
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1
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How does the electron configuration correlate with the emission spectrum of an ionic compound? [closed]
trying to find a way to correlate the electron configuration of an ionic compound (ie. Cupric sulfate, potassium chloride, Cupric chloride, sodium carbonate, strontium chloride) with its emission ...
1
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0
answers
482
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Substituting Ulexite
I'm working on ceramic glaze chemistry. One ingredient I don't have, but want to substitute is ulexite:
$$\ce{NaCaB5O6(OH)6.5H2O}$$
I have borax, calcium borate, and calcium silicate:
$$\ce{NaB4O7 ...
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1
vote
2
answers
635
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Why do increasing concentrations of zinc chloride not linearly decrease the freezing point?
I did an experiment on how different concentrations of $\ce{ZnCl2}$ affect the freezing point of demi water. My results were that till a concentration of about $10\ \mathrm{mol\,dm^{-3}}$ the freezing ...
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1
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1
answer
535
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How to make γ-MnO2 in a lab?
I am working on Li-ion batteries, and I need to use γ-$\ce{MnO2}$ (electrolytic manganese dioxide). I have googled and read quite a few papers, but I am not very sure of those methods. I'd love ...
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2
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1
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9k
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What will be the reaction between tin (II) chloride and copper (II) chloride?
I just tried conducting an experiment during lunch today. Now, I calculated this reaction 4 days ago dealing with electrochemistry,
$$\ce{SnCl2 + CuCl2 -> Cu(s) + SnCl4}$$
Theoretically, I got ...
4
votes
1
answer
2k
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Color imparted to flame and color of coordination compounds
When we heat a ionic substance/compound, the ionic bond gets weakened and the metal is ionized. Is the color imparted to the flame due to absorption of light? i.e. Do we see the remaining wavelengths? ...
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8
votes
1
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Continuous flow mass spectrometer for isotope analysis
If i took thousands of discrete samples of mineral fragments in a field study using a specialized drill, what mass-spectrometry techniques/equipment would allow me to analyse the samples as fast as ...
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9
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3
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What is the correct name for this lab technique in crystallization?
Take a glass rod and rub vigorously the wall of the flask, the substance will crystallize out of the solution.
Take a fire polished stirring rod and etch (scratch) the glass of your beaker. The small ...
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