Questions tagged [salt]

Use this tag for questions relating to salts and their properties.

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What happens to undissolved salt during electrolysis of brine?

Say we have a container of brine with excess NaCl in the anode, and a seperate container with just water at the cathode. Both are connected by a salt bridge. If we perform electrolysis, Sodium ions ...
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When is NaHCO3 formed in the reaction between H2CO3 and NaOH

I my textbook, in the section on basic salts, NaHCO3 is stated as an example. However, as to how its obtained, the text mentions that it's just obtained by the reaction between H2CO3 and NaOH, hence ...
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Why aren't NaF and KF (sodium and potassium fluoride) as common as NaCl and KCl? If fluorine is (roughly) as abundant as chlorine?

The abundances of chlorine and fluorine in Earth's crust, throughout Earth as a whole, etc. are roughly similar, from what I have been able to find... So... Why are crystals of sodium fluoride and ...
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Chemical name of a solution of ions such as salt dissolved in water [closed]

Is there any chemical name for the solutions of ions in water? I want to find out the name given to an aqueous solution of ions such as $\ce{Na+}$ and $\ce{Cl-}$ ions in water. Would it be something ...
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Increasing the weight in metal with salt? [closed]

Is it possible to increase the weight in metal (such as bronze) by exposing it, or soaking it in salt?
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2 votes
1 answer
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How to synthesize anhydrous zinc(II) nitrate?

I'm interested in making anhydrous zinc nitrate. I know it decomposes fairly rapidly if you heat it. It is also soluble in ethanol. Would another desiccant or a molecular sieve do the trick? Or maybe ...
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How to theoretically determine if a hydrate of a salt precipitates out of solution

In a solid-liquid extraction simulation process, there are multiple salts that precipitate in the solution. But how do I determine if these salts are hydrates or not? To give an example: $$\ce{Ca3(PO4)...
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3 votes
1 answer
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Why is there a difference in crystal shapes of sodium chloride (NaCl) and potassium chloride (KCl)?

According to Sodium chloride and Potassium chloride: Sodium chloride (NaCl) crystallizes, among various other shapes, into octahedron and tetragonal pyramid shapes which are absent in potassium ...
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Liquid water barrier and water vapor permeable membrane sheets

I am running an experiment where I am trying to maintain the relative humidity of a thermally insulated chamber. I am successfully able to hold the humidity using different salt solutions (NACL-75% RH,...
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2 answers
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Isolating potassium chloride from sodium chloride and potassium hydroxide

Assume that you have an aqueous solution of sodium chloride and potassium hydroxide. Is it possible to isolate potassium chloride from this? I'm thinking about the following: Na+(aq) + Cl-(aq) + K+(aq)...
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How can I get a breakdown of different salt contents in a fertilizer solution?

I am experimenting a lot with hydroponics i.e. growing plants in a liquid solution. From time to time, I would like to do a check on what is the current salt level for major salts (ions) in parts per ...
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Why does my sea salt have a best by date? [duplicate]

Seems like it should be good for thousands of years, if not millions.
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What happens when we react a sulfate salt solution with barium chloride and the formed precipitate with conc. hydrochloric acid?

When I performed this experiment in my school, I could not observe any sort of remarkable change (I must have performed it incorrectly or something). I wanted to know what should have been the correct ...
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1 answer
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What is the product of the following reaction(different sources give different answers) [closed]

$$\ce{FeS +dil HNO3}$$ $$\ce{FeS +conc HNO3}$$ I got different answers to these reactions in different sources Source1 Jd lee: Source 2 Op Tandon: Can anyone please explain which is the correct one ...
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1 vote
1 answer
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Why is sodium bisulfate acidic? [closed]

So, as I know, the rule says that if you get a salt from strong acid and strong base it should be neutral. In this situation with sodium bisulfate and also trisodium phosphate we get an acid salt, ...
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3 votes
3 answers
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Copper turned silver-color with crystalized soldered joints. How did this happen?

Please remove if this question if not allowed on this sub-exchange. I can post elsewhere if suggested. I was working on a small project requiring cleaning and polishing copper pipe, but found ...
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Salt extraction from water without affecting mercury concentration

I am looking to theoretically bio-analyze a water sample regarding its mercury concentration from both sea and lake water using a biosensor with an enzyme biorecognition element. However, a big issue ...
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How does one obtain a CuCl2 (solid or in solution with water) from a solution with HCl

I have a solution of CuCl2 and with HCl, and I want to seperate CuCl2 from the HCl. I cannot boil or distill the solution, since I don't have a fume hood or access to a safe enough space outdoors. So ...
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How does ethanol separates salts from proteins [closed]

Grad student here messing around with famed TRIzol isolation protocol and looking to optimize the protein yield at the end. There are more direct ways to get protein from a sample but I like getting ...
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What are all the steps I need to take to find the equillibrium for a gas-generating weak acid-base reaction in a closed container?

I have a carbonation system I did years ago using vinegar sodium bicarbonate. It generate gases in a container and the gases can pressurize another container to carbonate the liquid in it. I want to ...
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2 answers
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Burning wood with ammonium chloride

There is a method where you use a water solution of ammonium chloride to paint some pattern or write some text on a piece of wood and then blow on it with a heat gun. The result is that the pattern ...
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Nitrocellulose using Sodium Bisulfate instead of Sulfuric Acid

Recently, I came across this question with regards to making nitrocellulose using only nitric acid and not sulfuric acid: Nitrocellulose (flash paper) synthesis without Sulfuric Acid? One of the ...
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3 votes
1 answer
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Forming conjugate acid of borate anion via protonation

I am a biologist so please forgive me as I likely won't be as rigorous as a professional chemist. I am using the RDKit package to extract organic molecules from salts, where one ion is organic and the ...
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Low temperature sodium salt eutectic [duplicate]

I have a need for a sodium salt that melts below 265 degrees celsius, which will be exposed to liquid sodium metal. The anion is not important, only that it has a sodium cation. I have done a lot of ...
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1 answer
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lowest melting point of alkali salts [closed]

I want to make the alkali metals sodium and potassium through electrolysis of molten salts. However, I only have the ability to heat stuff up to about 260 degrees Celsius. What would be the lowest ...
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How do I crystallize Sodium Acetate w/o a crystal? [duplicate]

I made some sodium acetate. Definitely not pure or anything close. But I just did it as a quick experiment. Just some vinegar and baking powder. When I search how to make $\ce{NaOAc}$ crystals, people ...
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1 answer
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Can a salt bridge run out and become a regular bridge? [duplicate]

The goal of a salt bridge is to maintain electroneutrality in both of the half-cells. At the anode half-cell, the anode is oxidized. The resulting electrons travel up the wire to the load while the ...
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4 votes
3 answers
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What is the origin of the word salt as used in chemistry?

I have done a number of searches to determine why compounds of acids and bases are known as salts but came up empty. The fact that common salt dominates the word's usage means all my searches bring up ...
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How baking soda help in indigestion of stomach? [closed]

We have learnt that baking soda can be used for neutralizing excessive acid in stomach formed during indigestion. And after some time we get a burp(CO2) after drinking baking soda solution. So why we ...
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1 vote
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Hydrochloric acid from diaphragm electrolysis

I have a diaphragm electrolysis cell, which is made up of an outer container containing the cathode and a small terra cotta pot containing the anode. If sodium chloride solution is placed in the outer ...
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How is MgSO4 a neutral salt? [duplicate]

So the reaction for forming MgSO4 involves two reactants: H2SO4 and Mg(OH)2, However, the salt formed is netural. Even though H2SO4 is a strong acid and Mg(OH)2 is not a strong base. Shouldn't the ...
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1 answer
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Why isn't there hydrofluoric acid in fluoridated water? [closed]

From what I've read, when water is fluoridated it's done so either by $\ce{NaF}$ artificially or $\ce{CaF2}$ naturally. If this is correct, shouldn't the reaction $\ce{CaF2 + H2O -> CaO + 2HF}$ ...
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How much salt in a cup of water would it take to neither hydrate nor dehydrate the average person? [closed]

I don't know a lot about chemistry, and this question came up during lunch with my friend. I was interested in this question so I thought I could ask here. Sorry if I didn't use the right tags.
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DI water vs. Tap water in ethanol-water and salt phase change reaction

We did a very simple lab like one you would do in highschool showing that you can seperate the phases of water and ethanol using salt. As simple as it sounds, we could not get it to work no matter ...
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Attempting to make Rochelle salt but obtained paste

I was attempting to make Rochelle salt by adding sodium carbonate to a mixture of cream of tartar and water, but ended up with a solid paste. I kept the cream of tartar/water mix boiling the whole ...
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1 answer
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Displacement of salts due to higher solubility

I was wondering why mixtures of salts in the same solution precipitate excactly in order of their solubilities. Imagine a solution with NaCl, NaBr, NaI in equal moles. If AgNO₃ solution is now added ...
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-2 votes
2 answers
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Isn't hydrogen chloride a salt, because it is an ionic compound? [closed]

So I just learned in chemistry that salts are ionic compounds. Shouldn't, $\ce{H+Cl-}$ be a salt since hydrogen ion has positive charge and chloride ion has negative charge? If $\ce{HCl}$ is a salt ...
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Why is the enthalpy of solution of hydrated calcium chloride positive?

My book says that the enthalpy of solution of anhydrous calcium chloride is negative because it produces hydrated calcium chloride. But when hydrated calcium chloride is dissolved in water, the ...
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3 votes
0 answers
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Why is the reaction between calcium oxide and silicon dioxide neutralization? [closed]

I get that calcium oxide is a basic oxide and silicon dioxide is acidic. However by definition, neutralization is "when an acid and a base react to form water and a salt and involves the ...
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I mix table salt and baking soda with water to make mouth rinse, and leave them for several days. It started to form precipitation, and a bad odor [closed]

I mixed 2 spoons of baking soda with 1 spoon of salt and mixed them with water (but not mixing totally) and left them for several days. At first I saw some bubble but the water was clear, but then it ...
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1 answer
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Lithium Oxide Colour

According to Chemistry LibreText: Lithium is the lightest of all metals and is named from the Greek work for stone (lithos). It is the first member of the Alkali Metal family. It is less dense than ...
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Ferrous chloride solution coming out purple rather than green?

I've got some steel wool in hydrochloric acid to attempt to make ferrous chloride and the whole solution has turned purple. From everything I've seen it's supposed to be green. I have no idea what's ...
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Can chemical composition be determined from elemental composition?

I have the energy dispersive X-ray spectroscopy results from a sample of salt that I produced by collecting and processing ocean water by filtering, boiling, evaporating, and additional steps to try ...
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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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-3 votes
1 answer
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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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5 votes
1 answer
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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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-1 votes
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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 ...
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3 votes
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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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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 ...
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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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