All Questions
Tagged with ionic-compounds stoichiometry
12
questions
-2
votes
2
answers
300
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Why is Fe3O4 a non-stoichiometric compound? [closed]
Fe combines with O in a whole number ratio 3:2. Even the ions Fe2+ and Fe3+ are in the ratio 1:2. Then, why Fe3O4 is a non-stoichiometric compound?
-1
votes
2
answers
201
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What is the correct molecular, total ionic, and net ionic reaction equation of reaction between magnesium nitrate and sodium chromate? [closed]
From the question, I think that the reactants are $$\ce{Mg(NO3)2(aq) + Na2CrO4(aq)}$$
But the problem is, I am confused about the result of the reaction. Is it $$\ce{MgCrO4}$$ and/or $$\ce{NaNO3}$$?
...
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-2
votes
1
answer
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How do you write the ionization equation for calcium hydroxide?
This is a base that would ionize completely, and the dissociation equation would look like this: $$\ce{Ca(OH)2 <--> Ca^2+ + 2OH-}$$ but how would I write the Brønsted equation with water? $$\ce{...
15
votes
1
answer
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What is the analogue of "molecule" for ionic compounds?
In a system, if we have $\pu{18 g}$ of $\ce{H2O}$ ($M_\mathrm r = 18$), we can say we have a mole of water molecules or $6 \times 10^{23}$ molecules. But in another system, if we have $\pu{342 g}$ of $...
- 161
3
votes
2
answers
941
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Why is there an increasing solubility in water for chlorides, chlorates, perchlorates in that order?
According to Wikipedia $\pu{100 mL}$ of water dissolve at $\pu{25 ^\circ{}C}$ about $\pu{35 g}$ of $\ce{NaCl}$ (1), but about $\pu{79 g}$ of $\ce{NaClO3}$ (2), and around $\pu{210 g}$ for $\ce{NaClO4}$...
- 161
-5
votes
2
answers
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Percentage of yield reaction question
By bubbling $\ce{Cl2}$ in a solution containing $176.6~\mathrm{g}$ of $\ce{MgBr2}$ are obtained [sic!] $135~\mathrm{g}$ of $\ce{Br2}$. However, the yield of this reaction is not $100~\%$. How many ...
- 5
2
votes
2
answers
10k
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Why is potassium phosphate KH2PO4 in this reaction?
This is a continuation of this question because the first thing that came in my mind is that why potassium phosphate in this reaction is $\ce{KH2PO4}$ and not $\ce{K3PO4}$?
In the wikipedia article ...
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1
vote
2
answers
10k
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Help balancing reaction between Iron (II) chloride and potassium phosphate
Very rusty with chemistry and looking to review some basics. Came across the following:
Iron(II) chloride and potassium phosphate react. Write and balance the molecular, ionic, and net ionic ...
- 21
0
votes
1
answer
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Calculating the chloride concentration
What are the concentrations of $\ce{Cl-}$ in the following solution? $1.9\ \mathrm{g}\ \ce{MgCl2}$ is dissolved in water to make $1\ \mathrm{L}$ total solution
$$48.31\ \mathrm{g/mol}\ \ce{MgCl2}$$
$...
- 113
12
votes
1
answer
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What happens when potassium iodide is added to a copper (II) salt?
$$\ce{Cu^2+ + KI -> ??}$$
I thought of this reaction:
$$\ce{Cu^2+ + 2KI -> CuI2 + 2K+}$$
But since $\ce{CuI2}$ doesn't exist, the $\ce{I-}$ ions must reduce $\ce{Cu^2+}$ to $\ce{CuI}$ and ...
- 26.3k
2
votes
4
answers
17k
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Is F2 two fluoride ions or just one?
I'm attempting to write the balanced equation of the combination of lithium metal and fluorine gas. I understand that this will produce an ionic solid because it is a reaction of a metal and a ...
2
votes
4
answers
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Equation for salt formation for ammonium oxalate?
I'm having trouble finding out the salt formation equation for $\ce{(NH4)2C2O4}$
I thought it was $\ce{NH3 + H2C2O4}$ but that doesn't seem to balance out.
$\ce{HC2O4-}$ seems to work, but are ions ...
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