#salt analysis

[zouisforya]

as fun it is doing salt analysis it's equally boring writing it 😭😭

[aplustopperposts]

Qualitative Analysis of Salts What is qualitative analysis? Qualitative analysis of a salt is a chemical technique used to identify the ions present in a salt by analysing its physical and chemical properties and hence determine the identity of the salt. It determines only the presence or absence of a particular ion in a given …

[zouisforya]

omg we did that flame test today for strontium and barium and it was soooo COOOL!! looked like a phuljadi istg 🥹🥹

[quietimtryingtostudy]

You know when you smell the fumes coming from the test tube where Cl2 reacted with concentrated H2SO4 and then you feel like your nose and head have a fire burning in them and you loved learning about it but hated that excruciating feeling thingy? Yeah same.

[a-confusedmess]

Salt analysis in Chemistry Practical Exams

Teaming up with all the people who have the same sample even though it is an exam and you are supposed to work individually

Dropping acid on your hand and being scared for your life

Thinking the world is about to end when you can't identify the smell of the gas

Alternatively almost choking to death on a gas (I inhaled an unhealthy amount of Chlorine yesterday)

Is that white precipitate, or wait, it could be yellow too...why don't we have pictures to compare

Is that even a precipitate or just the solution being cloudy

Also talking to the other groups to eliminate cations and anions

Everyone in the group being assigned to try out all the confirmatory tests just to be sure

Also being mesmerized by the beautiful colors sometimes

All in all, total chaos and full-on anxiety

[bunnyroy]

Salt Market - Global Industry Analysis, Size, Share, Growth, Trends and Forecast 2018 – 2022

Salt Market – Global Industry Analysis, Size, Share, Growth, Trends and Forecast 2018 – 2022

MarketResearchNest.com adds “Global Salt Market 2018-2022”new report to its research database. The report spread across 127 pages with table and figures in it.   Research analysts forecast the global Salt market by audit firms to grow at a CAGR of 1.97% during the period 2018-2022.   About Salt Inorganic chemicals are basically those which are mainly derived from inanimate earth materials such as…

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[chemcool]

How to distinguish between Carbon dioxide and Sulphur dioxide?

While performing Salt Analysis, the action of heat on a salt with or without an acid will release gases that can be used to identify the anion of the salt. For example, carbonate salts will release \(CO_2\) and bisulphite salts release \(SO_2\). These gases are then identified with appropriate tests.

\(CO_2\) when passed through lime water makes it turbid (milky) and if the passage of \(CO_2\) is prolonged the turbidity disappears and the solution becomes clear again.

\(CO_2 + Ca(OH)_2 \rightarrow CaCO_3\downarrow + H_2O\)

\(CaCO_3\downarrow + CO_2 \rightarrow Ca(HCO_3)_2\)

\(CaCO_3\) is a precipitate and is responsible for the turbidity of the solution.

\(Ca(HCO_3)_2\) is soluble in water and is responsible in making the solution clear again.

\(SO_2\) when passed through lime water makes it turbid (milky) and if the passage of \(SO_2\) is prolonged the turbidity disappears and the solution becomes clear again.

\(SO_2 + Ca(OH)_2 \rightarrow CaSO_3\downarrow + H_2O\)

\(CaSO_3\downarrow + SO_2 \rightarrow Ca(HSO_3)_2\)

\(CaSO_3\) is a precipitate and is responsible for the turbidity of the solution.

\(Ca(HSO_3)_2\) is soluble in water and is responsible in making the solution clear again.

Visually, the same visual thing is observed when \(CO_2\) and \(SO_2\) is passed through lime water. What is the test to distinguish between the two, then?

Here is the reaction to distinguish between them. The gas is passed into to an aqueous solution of acidified Potassium Dichromate. If the colour of the solution (which is originally orange) turns to green, then the gas is \(SO_2\).

Chromium in its +6 oxidation state and in the dichromate (\(Cr_2O_7^{2-}\)) form is orange in colour and in its +3 oxidation state is green in colour. The change in colour in the above reaction shows that \(Cr_2O_7^{2-}\) ion is reduced to the \(Cr^{3+}\) ionic state. This also means that the compound that reacted with \(Cr_2O_7^{2-}\) ion should have been oxidised.

Out of \(CO_2\) and \(SO_2\), only \(SO_2\) can be oxidized as in \(CO_2\), Carbon is already in its highest oxidation state (+4). The reaction between \(SO_2\) and acidified \(Cr_2O_7^{2-}\) ion is given below.

\(Cr_2O_7^{2-} + 3SO_2 + 2H^+ \rightarrow 2Cr^{3+} + 3SO_4^{2-} + H_2O\)

What do you think will the colour change be if acidified \(KMnO_4\) is used instead of acidified \(K_2Cr_2O_7^{2-}\)?

Hint: \(Mn^{7+}\) is Purple in colour, \(Mn^{4+}\) is buff coloured, \(Mn^{2+}\) is pale pink coloued and \(Mn^{6+}\) is green coloured.

[jurassicparkss]

So salt analysis didn't come on the co-ordinated sciences alternative to practical. THANK GOD!!!!!