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Results tagged with acid-base
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user 418
This tag should be applied to questions concerning acid and base reactions. An acid is capable of donating a hydron/ proton (Brønsted acid) or capable of forming a covalent bond with an electron pair (Lewis acid). A base on the other hand is a chemical species/ molecular entity having an available pair of electrons capable of forming a covalent bond with a hydron/ proton (Brønsted base) or with the vacant orbital of some other species (Lewis base).
1
vote
Acid-base related chemistry
Since this sounds like a homework question, I will not provide a full solution!
Is $\ce{SiO2}$ an oxidizing or reducing agent in the reaction?
Figure out the oxidation state for the $\ce{Ca}$ and $\ce …
- 44.2k
2
votes
Accepted
How do I write out the chemical reaction of ammonia with strong acid?
In the second part, for example, $\ce{Zn}$ is 2+ and $\ce{H}$ is -1. So using the criss-cross method, you get $\ce{Zn(NO3)2}$ and water. I understand this.
I don't agree on the -1 for hydrogen, l …
- 44.2k
4
votes
Why does H₂Se have a bigger Ka2 than H₂Te
The following data are from the Rubber Book (CRC Handbook of Chemistry and Physics), 89th edition, 2009, p 8-40.
\begin{array}{lll}
\mathrm{acid} & \mathrm{pK_{a1}} & \mathrm{pK_{a2}} \\
\hline
\ce{ …
- 44.2k
4
votes
Possible ammonia anomaly?
Is this an anomaly of ammonia, or is there something fundamentally wrong about my equations?
Fundamentally wrong would be a bit harsh ;)
But notice that the reaction
$$\ce{HCl + NaOH -> NaCl + …
- 44.2k
0
votes
What is the reaction equation for a mixture of trichloroethanoic acid and dimethylpropanoic ...
[…] I know that $\ce{Cl3CCO2H}$ is the stronger acid
With other words: This is the Brønsted donor. Show some confidence in your knowledge and draw:
- 44.2k
3
votes
Comparison of acids to dissolve phosphates
Indeed, n (pretty weird, chemists would use the capital N) is used for normality.
In their fast test, the authors try to dissolve 100 mg (0.322 mmol) of $\ce{Ca3(PO4)2}$ with different acids and buff …
- 44.2k
6
votes
How can I make an acidic pen to burn paper on writing on it?
In principle, a solution of white phosphorus in carbon disulfide ($\ce{CS2}$) can be used as an "ink" to set paper on fire. This video demonstrates the effect.
Is it a good idea? NO!
While the disgu …
- 44.2k
2
votes
How to separate HCl and NaOH from an aqueous solution of NaCl?
One day I came to know that on mixing salt and water I will get Hydrochloric Acid and Sodium Hydroxide [...]
No, you won't!
In theory, electrolysis of a sodium chloride solution and photolysis o …
- 44.2k
5
votes
Adding lemon to lentils changes color from black to pink, why?
Black lentils contains a natural pH indicator. These dyes change their colour depending on how acidic (or alkaline) the solution is. The dyes are water-soluble, consequently you can observe the colour …
- 44.2k
1
vote
Calculating concentration and volume in acid metal reactions
Your equation uses molar ratios, rather than weights or volumes.
If you know the weight of zinc used, you know the number of moles. From this, you can calculate the number of moles of zinc phosphate …
- 44.2k
5
votes
Accepted
History of acid-base reactions
There's a bit of a misconception on what actually happens in the video linked in your question:
The reactions between alkali metals, namely lithium ($\ce{Li}$) and sodium ($\ce{Na}$) and water, dil …
- 44.2k
2
votes
Selecting between redox and neutralization reactions for a mixture of HCl, H2SO4 and NaOH
Fortunately, sulfurdichloride and disulfurdichloride (= sulfurmonochloride), which is the decomposition product of the former,
$$\ce{2SCl2 <=>> S2Cl2 + Cl2}$$
cannot be prepared that way.
I suggest …
- 44.2k
13
votes
Why isn't dry CaCl₂ used to dry HCl gas instead of concentrated sulfuric acid?
There are several reasons:
Efficiency
When a stream of wet hydrogen chloride is run through a tube filled with coarse calcium chloride "rocks", interaction with the drying agent takes place at at it …
- 44.2k
1
vote
Chemical Equillibria Comparisons
You have already ruled out the equations b, c, and e.
But I'm not sure how to compare the remaining two reactions.
Have a look at equation a again.
The reaction of $\ce{P4O10}$ with water gener …
- 44.2k
4
votes
What is the word for how polyprotic an acid is?
Proticity does sound nice, but it is a bad choice since the term has already been introduced by Peter D. Mitchell (1978 Nobel Prize in Chemistry) in a completely different context.
In his Nobel Lectu …
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