Questions tagged [salt]
Use this tag for questions relating to salts and their properties.
73
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Corrosive potential of molten ionic salt
I was looking at this video about fourth generation of nuclear reactors and one of developing concepts is molten salt reactor (MSR) where melted ionic salt replaces water as coolant and also acts as a ...
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1answer
79 views
Nomenclature of Colors of precipitates and solutions
I have just started learning salt analysis in inorganic chemistry. In it i came across the names of colors of various precipitates and solutions. Why do they have prefixes such as "scarlet" ...
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0answers
40 views
InChI issue with organic salts, inconsistent approach?
I am wondering why there is the following inconsistency in InChI:
penicillin G vs. penicillin G potassium salt uses the /p layer to drop a proton
but chloramine-T vs. tosylchloramide drops an H from ...
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1answer
42 views
Rock salt as a green, non-electrical dehumidifier?
Has anyone tried using rock salt as a dehumidifier? Ive read a few DIY bits on it. I live in Georgia and its swampy and humid. I have a couple small dehumidifiers but I'm looking for some green and ...
5
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0answers
42 views
Why is surface tension of water decreasing as sodium chloride concentration increases? [duplicate]
For my IB chemistry IA, I am measuring the impact of salinity concentration on the surface tension of water (i am using distilled water). My hypothesis is:
As the concentration of salt increases, ...
1
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1answer
65 views
Do superoxide salts of heavier alkali metals contradict the principle that lattice energy depends inversely on cation-anion distance?
I have a very basic understanding of quantitative lattice energy calculations: I only know that the lattice energy is directly proportional to the product of charges on the ions and inversely ...
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1answer
72 views
Qualitative analysis of the anionic part of a salt using it's soda extract [closed]
While testing for anions using dilute $\ce{H2SO4}$, we prefer using the soda extract for tests rather than the actual salt. But we don’t use it for tests of carbonates, bicarbonates and sulphites. Why ...
1
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1answer
50 views
Salt solubility and solvent dissociation
A textbook, describing a qualitative test for the $\ce{Al^3+}$ cation in which you use $\ce{NH4Cl}$ and $\ce{NH4OH}$ to precipitate $\ce{Al(OH)3}$, mentioned that the solubility of this precipitate ...
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1answer
68 views
On basic mercury salts
$\ce{HgCO3.3HgO}$ and $\ce{HgO.Hg(NH2)Cl}$ are called basic mercury carbonate and basic mercury amidochloride, respectively. I found this thread on the former; I've only seen the latter as the product ...
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0answers
43 views
Which salts give the sodium carbonate bead test?
Apart from the borax and the phosphate bead tests, there's also this one.
It's done by heating the white bead of sodium carbonate and the salt with potassium nitrate; green and yellow colours ...
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32 views
Identification of salts observed in steam vaporiser
Recently I observed some precipitated salts in steam vaporizer after completion of vaporization.
I am guessing that some of the white particles may be calcium carbonate ($\ce {CaCO3}$) formed from ...
6
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3answers
1k views
Why is sea salt coarse?
What makes sea salt coarser than other salt?
I have tried checking online but no one seems to discuss this. It seems that the grain of sea salt is larger, but I don't understand since the salt is ...
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1answer
68 views
Ought I add salt to water bottles, if I'm putting the bottles in front of a fan to improvise an air conditioner?
Is this advice correct? Are they alluding to Freezing Point Depression? Adding salt to tap water lowers the Crystalloid's freezing point.
Pour 3 tbsp (51 g) of salt into each of your 3 plastic water ...
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0answers
98 views
Why is magnesium sulfate more soluble in water than that of strontium and calcium sulfates?
Magnesium sulfate is soluble in water. Its solubility is $\pu{26.9 g}/\pu{100 mL}$ at $\pu{0 ^\circ C}$ $(\pu{35.1 g}/\pu{100 mL}$ at $\pu{20 ^\circ C})$.[1]
However, both calcium sulfate $(\pu{0.21 g}...
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1answer
146 views
Why Heating of certain salts like Lead salts produce crackling sound?
I recently discovered that heating of certain salts produces crackling sound and that is called Decrepitation. But I couldn’t figure out the reason why that happens moreover I couldn’t find anything ...
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1answer
60 views
Can potassium carbonate be used to calibrate hygrometers?
Context:
In the process of trying to calibrate a number of hygrometers, with Sensirion MEMS electronic sensors, I came across the method of using wet salt: an airtight container will stabilize at a ...
2
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0answers
35 views
Out of KCl, CaCl2, MgCl2, NaCl, which causes the greatest corrosion rate of iron and why?
I know that salts act as an electrolyte in a redox process and rusting of iron, where iron loses electrons and oxidizes, and oxygen gains electrons and reduces. I did an experiment with KCl, NaCl, ...
6
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1answer
276 views
Why does the specific conductivity against concentration curve for NaCl curve more than KCl?
I understand why KCl has a higher specific conductivity than NaCl.. but I dont understand why the curvature is more significant for NaCl (KCl is a straight line). Ive provided a picture of this here, ...
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1answer
680 views
NaCl electrolysis with copper electrodes
Considering the aqueous $\ce{NaCl}$ is already concentrated. If we were to use copper electrodes instead of inert graphite electrodes:
Would copper react with the evolved chlorine gas to give $\ce{...
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1answer
30 views
Would adding a water soluble salt (e.g. NaCl) affect a water sensitive reaction?
Let's take for example a reaction that would benefit from having less water in it, ester formation from alcohol and acid. We know that the equilibrium can be shifted to the right (ester formation) if ...
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1answer
35 views
Why do we need weak or strong acids to displace the anions of other weak acids from salts?
I have already looked at Why does a strong acid displace salt of weak acid? but I couldn't understand the answer and the analogy there. And I mean the above question in the following context :
$\ce{...
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91 views
How do I go about calculating the enthalpy of a solution with an unknown salt?
I have the $\Delta T$, I have the specific heat of the calorimeter, I have known weights/mass. I know the salt is lithium-based. What steps do I take to calculate the enthalpy of the solution so I can ...
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2answers
148 views
How is NaOH a base? [closed]
Firstly, how is $NaOH$ created? My teacher said that before it is $NaOH$, it is $NaO^-$.
$$NaO^- + H_2O = NaOH + OH^-$$
If so, that means that $NaO^-$ is a base, which would make $NaOH$ it's conjugate ...
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0answers
14 views
How can I wet etch Nickel Chloride (NiCl/NiCl2) off a GaN sample
Apologies in advance for what may be a basic chemistry question - I'm asking from the point of view of microlithography.
I have a Gallium Nitride sample which I have etched in a Ar/Cl plasma with a ...
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0answers
18 views
Salting out worsens extraction efficiency
I'm currently writing a thesis about using dispersive liquid-liquid microextraction DLLME for extracting nitramines from aqueous solutions. We've been using octan-1-ol as the extractant and HPLC for ...
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1answer
93 views
Effect of magnetism on dissolved Na+ and Cl- ions in water
Suppose we have put some salt in water. My state of knowledge is, that a hydration envelope is formed from the oxygen side of the water molecules on the Na+-Ions and one another from the hydrogen side ...
2
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1answer
87 views
How to read mutual solubility curves of salts with a common ion?
Came across a few graphs that represent the mutual solubility of two compounds in a solvent, for e.g., solubility of $\ce{KCl}$, and $\ce{NaCl}$ in $\ce{H2O}$.
On these particular graphs, I can see $x$...
3
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0answers
20 views
Aluminum Battery with PAC setup : Rapid voltage drop problem after a charge
I am a retired man and seek for activity. I dont have background in chemistry but I want to learn an aluminum battery..the known problem is my aluminum metal get eaten and also corrosion even if using ...
2
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1answer
379 views
Order of solubility of sodium halides and potassium iodide
Order the following ionic compounds in decreasing order according to their ease to dissolve in water.
a) NaBr; b) KI; c) NaF; d) NaCl.
d > a > b > c
a > b > c > d
b > c > d &...
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1answer
218 views
Can someone explain why the electrical conductivity of magnesium chloride decreases with increasing concentration?
I was under the impression that the electrical conductivity should increase initially, then begin to plateau, then fall past the saturation point for strong electrolytes. However, from this, I see ...
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1answer
124 views
How to differentiate hydrous and anhydrous compound? [closed]
For an experiment, my teacher gave me containers of hydrates and their corresponding anhydrous compounds, but I have a feeling that for one of the compounds she switched the hydrate and anhydrous ...
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1answer
106 views
When blue vitriol is dissolved in water [closed]
when CuSO4.5H2O is dissolved in water, what physical and chemical effects happens to its water of crystallization?
While solving a stoichiometric problem the ques was that 1litre of CuSO4.5H2O was ...
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1answer
59 views
Calculating the density of a magnesium sulphate solution
I am trying to calculate the density of a magnesium sulphate solution and came across this paper which determines an equation from experiment to do that. However, I am having trouble understanding the ...
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1answer
59 views
Extracting other mineral from salt in evaporated seawater
I recently stumbled upon this news:
Seawater contains 47 minerals and metals. Starting with the most abundant and proceeding to the least abundant, these are chloride, with a concentration of $\pu{18 ...
0
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1answer
106 views
What makes the enthalpy of hydration of calcium chloride dihydrate unique? [closed]
I have recently done an experiment in an attempt to find the relationship between the water ratio in a hydrate and the enthalpy of hydration, and my results showed a correlation, but an anomaly for ...
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1answer
22 views
Significance of enthalpy of hydration of salts [closed]
I've been researching for weeks but can't find anything on a real life process of hydration, as my experiment is determining the relationship between the enthalpy of hydration and different types of ...
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3answers
68 views
A problem regarding solubility and concentration
A solution is $\pu{0.10 M}$ $\ce{Ba(NO3)2}$ and $\pu{0.10 M}$ $\ce{Sr(NO3)2}$. If solid $\ce{Na2CrO4}$ is added to the solution, what is the $\ce{[Ba+]}$ when $\ce{SrCrO4}$ begins to precipitate? $\...
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1answer
126 views
Will a salt dissociate completely in water to give free ions?
I was reading salt hydrolysis of a salt made from strong acid and weak base. I came across the hydrolysis of $\ce{NH_4Cl}$. These reactions were mentioned
$$\ce{NH_4Cl + H_2O<=>NH_3 + HCl \tag{...
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1answer
163 views
How does chromium behave in a carbonate solution? [closed]
I'm wondering how chromium (as a metal or as a salt) behaves in a concentrated carbonate solution. Will it form any, one or several carbonate specie(s)? Will the metal solubilize? How does it affect ...
0
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1answer
86 views
Monosodium Diphosphate (NaH3P2O7) Preparation
I looked on wikipedia for an answer but I couldn't even find a page for this salt, a subsequent google search didn't further enlighten me.
Does any one know how monosodium diphosphate can be prepared?
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2answers
1k views
How to differentiate between iron and sodium flames?
According to my textbook, when a flame test of an iron salt is performed, it produces an orange, mostly yellow flame. Sodium salts also produce a yellow flame.
As the colours of these two flames are ...
5
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2answers
1k views
What is happening when KCl burns in a bunsen flame? [closed]
I did the experiment to qualitatively observe the different colours given off by different salts when placed in a flame.
But what is actually happening to the salt ?
Take $\ce {KCl}$ for example.
Does ...
0
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1answer
64 views
Why isn't auto ionisation of water considered when we find the pH during salt hydrolysis?
$\ce{H+}$ concentration from the auto-ionisation of water is $10^{-7}$
If we have $\ce{HA}$ as weak acid and $\ce{BOH}$ as weak base having $\mathrm pK_\mathrm{a} = 3.2$ and $\mathrm pK_\mathrm{b} =3....
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1answer
133 views
How are diazonium salts prepared without self coupling
While preparing diazonium salts, what prevents the freshly formed diazonium salt from reacting with the still unreacted amines left in the solution and perform diazo coupling?
If this happened then ...
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1answer
53 views
Which salt is a surfactant and lowers the surface tension of the water? [closed]
I am doing my experiment on the surface tension of the water. How to show the decrease of surface tension of water with the increase in the concentration of salt? Is there any salt that lowers the ...
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2answers
114 views
How does the surface tension of water decrease with an increase in the concentration of NaCl?
Can anyone help me with the theory of surface tension? My chemistry experiment is related to the surface tension and concentration of NaCl. I am confused about my hypothesis. On the internet, I found ...
4
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1answer
199 views
Why is the test for sodium as dihydrogen antimonate so specific?
I have been attending lectures of salt analysis in my college. We are at group 6 cations or also known as group zero cations, namely $\ce{NH4^+}$, $\ce{K^+}$, $\ce{Na^+}$, $\ce{Mg^2+}$.
The lecturer ...
2
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0answers
44 views
Why I get acidic solution at brine anode?
I have decomposed $\ce{NaCl}$ solution (brine) with electrolysis and yield $\ce{NaOH}$ at cathode, at anode I got acidic while expected was $\ce{NaClO}$ (alkaline) if it is $\ce{HOCl + HCl}$. Where ...
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0answers
61 views
What happens when you burn salt in paraffin
My 9 year-old son and I tried to do some extremely amateur flame testing...
We lit a paraffin burner [a little tin of paraffin jelly that came with a marshmallow 'smores' kit!] and sprinkled on about ...
2
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0answers
40 views
How to calculate the pH of solutions of amphoteric salts? [duplicate]
I've been trying to understand how to calculate the pH of solutions of amphoteric salts, but I just can't figure it out. So, I've seen that it is commonly explained like this (example for a solution ...
