Questions tagged [salt]
Use this tag for questions relating to salts and their properties.
45
questions
2
votes
1answer
53 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 ...
0
votes
1answer
45 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 ...
0
votes
1answer
38 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 ...
0
votes
0answers
34 views
What determines the degree of hydration? [closed]
Different salts have different degrees of hydration (example: Na2CO3·1H2O or CaCl2·2H2O). I just wanted to know what determines the coefficient of H2O in these hydrated compounds?
0
votes
1answer
49 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 ...
0
votes
1answer
36 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
votes
1answer
60 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 ...
-1
votes
0answers
17 views
Why does enthalpy of hydration increase as water ratio in hydrate increases?
I recently did an experiment for a lab report where I found that hydrates with a larger water ratio (like how CaCl2⋅2H2O has a water ratio of 2, and Na2S2O3⋅10H2O has a ratio of 10) have a higher ...
-1
votes
1answer
18 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 ...
-2
votes
0answers
24 views
How much volts and ampere to produce Hypochlorous acid aka electrolyzed water (1000 ppm) through electrolysis?
Sorry for by bad english.
I want to make hypochlorous acid (1000 ppm) 1 litre using electrolysis but dont have any knowledge regarding the power that should be used in producing it.
I read Somewhere ...
-3
votes
0answers
36 views
Tried to make calcium acetate out of eggshells and vinegar but I did it wrong. How many ways are there to make the jelly?
I was trying to follow a handful of online tutorials showing how to make a flammable jelly-like substance out of eggshells mixed in vinegar, but I think I did it wrong.
I put regular, unboiled ...
0
votes
3answers
60 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? $\...
-1
votes
1answer
46 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{...
-1
votes
1answer
52 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
votes
1answer
47 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?
12
votes
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
votes
2answers
513 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
votes
1answer
49 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....
0
votes
1answer
70 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 ...
0
votes
1answer
29 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 ...
0
votes
1answer
41 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
votes
1answer
182 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
votes
0answers
36 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 ...
1
vote
0answers
42 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
votes
0answers
33 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 ...
3
votes
1answer
60 views
Alkoxide metathesis
I am attempting a synthesis for acetylacetone. The preparation I wish to carry out is described on orgsynth by condensation of acetone and ethyl acetate with a base catalyst.
The problem for me is ...
5
votes
0answers
45 views
What acids, solvents is lithium-6 fluoride soluble in (other than HF)?
$\ce{LiF}$ is quite insoluble in water, and I'm trying to use some water-soluble acid or solvent to dissolve $\ce{^6LiF}$ (95% enriched) in. I'm not a chemistry person, I'm a radiation detection ...
0
votes
1answer
144 views
Are there any tasteless edible salts? [closed]
I saw on Youtube a video where caffeine was extracted from Red Bull using dichloromethane. However, due to dichloromethane tendency to form emulsions with liquid, an inefficient method was used to mix ...
-3
votes
1answer
134 views
Reaction Of Carbonic Acid With NaCl [duplicate]
I was just wondering if it was possible for anyone to specify what reaction conditions are required for the reaction between $\ce{H2CO3}$ (Carbonic Acid) and $\ce{NaCl}$ (Sodium chloride)?
Does this ...
1
vote
1answer
47 views
How to write the formula of a mixed metal salt?
I suppose the formula of the Sulphate salt of Sodium & Potassium is $\ce{KNaSO4}$ as the Pubchem site says so.
So, is there any rule that in the formulae such mixed metal salts we need to write ...
0
votes
1answer
53 views
How do I calculate the humidity inside sealed containers containing mixing salts?
At $\pu{25 ^\circ C}$:
saturated Magnesium chloride $\ce{MgCl2}$ keeps humidity 33% inside sealed containers.
saturated Sodium chloride $\ce{NaCl}$ keeps humidity 75% inside sealed containers.
I ...
0
votes
1answer
25 views
How does pressure influence the dehydration of salts?
It's well known that the boiling point of a substance increases with pressure. I was wondering if something similar happens with hydrated salts and the temperature at which they dehydrate.
I mean, if ...
0
votes
1answer
35 views
Why does Sodium Hydrogen Sulfate (Sodium Bisulfate) produce moisture?
In my chemistry lab, I have a vial of Sodium Hydrogen Sulfate (Sodium Bisulfate). I've noticed that when I take a spoonful using a spatula, the spatula gets covered in many tiny droplets, and the lid ...
4
votes
1answer
202 views
Can ionic compounds dissolved in organic solvent conduct electricity?
Ionic compounds dissolved in water, as an aqueous solution, can conduct electricity.
Can they conduct electricity if they are dissolved in organic solvent?
1
vote
2answers
131 views
Can separated and purified substances be obtained from a chromatogram?
I am studying chemistry, and I am learning about chromatography.
But I am confused about how chromatography is used to ‘separate and purify’ substances.
I have learnt about chromatography paper, ...
0
votes
2answers
2k views
Salt Bridges/Porous Disks
I am slightly confused about the concept of a salt bridge/porous disk. I understand that these are necessary in a galvanic cell since there is a charge buildup and the salt bridge and porous disks ...
0
votes
2answers
563 views
Remove only salt from salt water
I have a bottle of salt water I collected on a local beach. I want to see what is in it, apart from water and salt. If I boil the whole bottle and wait for it to evaporate, mostly salt will remain. I ...
2
votes
1answer
165 views
Why is brine solution more effective than granular salt in melting ice on a surface?
Why is a brine solution consisting of a small fraction of salt in water, more effective in melting ice on a surface, than just pure salt?
6
votes
2answers
586 views
Remove salt from dirt
I have a mixture that contains out of dirt/sand and salt. I want to extract and measure the salt. What would be the best way to extract the salt from this mixture?
2
votes
1answer
1k views
How to use this salt analysis chart to determine the cations present in a given solution?
With the only possibilities being $\ce{Ba^2+, Ca^2+, Cu^2+, Fe^2+, Fe^3+, Pb^2+}$, what cations are present in a solution which:
a) Forms a white precipitate with sulfate and with fluoride, no ...
6
votes
2answers
2k views
The Salt Room, is there salt in the air?
I work in a restaurant where we dry age our uncut steaks in a cooler. Dry aging is a wonderfully complex process that improves the flavor of richly marbled steaks. Our particular type of aging cooler ...
0
votes
1answer
503 views
Hydrolysis of salt
The hydrolysis of salt tells you whether a salt is acidic or basic. But it does not tell you how acidic or basic a salt is. Is there a way to determine this?
My guess is that taking of the weak base ...
4
votes
1answer
194 views
Electride salt preparation
In preparation for the Birch reduction, I am trying to prepare an electride salt, $\ce{[Na(NH3)6]+, e-}.$ This salt should be brilliant blue, as far as I know, but I am getting a black sludge when ...
2
votes
2answers
2k views
Table Salt vs Kosher Salt difference
Does kosher salt has a different structure than regular table salt or it is an issue of crystals size?
Why some recipes want us to use one instead of another?
2
votes
1answer
576 views
Salt Hydrolysis
Referring to this, when "hydrolysis of a salt" is its reaction with water:
How is it that both the cation and anion of the salt are reacting in an equal amount with water?
To state this specifically ...
