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How does adding anhydrous sodium sulfate to the dichloromethane solution remove water?
Anhydrous sodium sulfate is a desiccant, meaning it has a strong affinity for water. When added to a dichloromethane solution, the anhydrous sodium sulfate will absorb any water present, effectively removing it from the solution by forming a hydrated salt. The water-free dichloromethane can then be decanted or filtered off for further use.
What else can I help you with?
Why add sand and anhydrous magnessium sulphate to a leaf during chromatography?
Adding sand and anhydrous magnesium sulfate to a leaf during chromatography helps to break down the plant cells and extract the pigments effectively. Sand mechanically grinds the leaf tissue, while anhydrous magnesium sulfate acts as a drying agent to remove water from the leaf, allowing for better separation of pigments during chromatography.
Use Hess's law or the above equation to find the heat of solution when potassium sulfate is dissolved in water?
To find the heat of solution when potassium sulfate is dissolved in water, you can use Hess's law. This involves adding the heats of formation of the products and subtracting the heats of formation of the reactants. You can use the enthalpies of solution of potassium ions and sulfate ions to calculate the overall heat of solution for potassium sulfate.
How can you identify Sulphate anions in a unknown solution?
Dip a copper coin in that unknown solution And make that solution slightly acidic. After about one hour, take out the copper coin and if there are green colours deposits then there is sulphate, otherwise not.
Is adding water to heated copper sulfate crystals chemical or physical?
Adding water to heated copper sulfate crystals is a chemical change. When water is added to heated copper sulfate crystals, the copper sulfate undergoes a chemical reaction where it dissolves in the water to form a solution. This is a chemical change because the chemical composition of the copper sulfate is altered during the process.
How do you get copper from copper sulfate solution?
Copper can be obtained from copper sulfate solution by electroplating it onto an electrode or by adding a metal higher in the electromotive series than copper, such as iron, to the solution. The more active metal will dissolve by displacing copper in metallic form from the copper sulfate.
If you add anhydrous sulphate to water do you get a chemical reaction?
yes you do. this is because the anyhdrate was white (crystals) and after adding water, it turned blue
How do you estimate the anhydrous magnesium sulphate added is enough for the solvent in the extraction experiment?
To estimate if the anhydrous magnesium sulfate added is sufficient for the solvent in an extraction experiment, you can visually assess the clarity of the solution. If the solution remains cloudy or turbid after adding magnesium sulfate, it indicates that more drying agent is needed to absorb residual moisture. Additionally, you can monitor the drying process by checking for any visible sediment of magnesium sulfate at the bottom, which suggests it's absorbing moisture effectively. Finally, ensuring that the amount added corresponds to the solvent volume and the expected moisture content can also guide your estimation.
Why add sand and anhydrous magnessium sulphate to a leaf during chromatography?
Adding sand and anhydrous magnesium sulfate to a leaf during chromatography helps to break down the plant cells and extract the pigments effectively. Sand mechanically grinds the leaf tissue, while anhydrous magnesium sulfate acts as a drying agent to remove water from the leaf, allowing for better separation of pigments during chromatography.
Where is the excess copper from after adding zinc to copper sulfate?
The "excess" metallic copper produced by adding zinc metal to a copper sulfate solution comes from exchanging zinc atoms from the metal for copper atoms from the copper sulfate solution. During the reaction, the zinc atoms are ionized to cations and the copper cations from the solution are reduced to neutral atoms.
Why is it necessary to remove water by adding anhydrous sodium sulfate (step 4)?
Because many chemical procedures need dried reagents
What do you add to an acid to make it show that it contained sulfate ions?
Sulfate ions in a solution are verified by adding BaCl2. If an acid was not added, it might be confused with BaCO3, if the solution has carbonate ions.
What is copper sulfates relative formula mass?
The anhydrous copper sulfate (CuSO4) has a molar mass of 159,62.
Use Hess's law or the above equation to find the heat of solution when potassium sulfate is dissolved in water?
To find the heat of solution when potassium sulfate is dissolved in water, you can use Hess's law. This involves adding the heats of formation of the products and subtracting the heats of formation of the reactants. You can use the enthalpies of solution of potassium ions and sulfate ions to calculate the overall heat of solution for potassium sulfate.
How can you identify Sulphate anions in a unknown solution?
Dip a copper coin in that unknown solution And make that solution slightly acidic. After about one hour, take out the copper coin and if there are green colours deposits then there is sulphate, otherwise not.
What is the test for barium ions?
The test for barium ions involves adding a solution of a sulfate compound (e.g. sodium sulfate) to a solution containing the barium ions. A white precipitate of barium sulfate forms if barium ions are present.
Is adding water to heated copper sulfate crystals chemical or physical?
Adding water to heated copper sulfate crystals is a chemical change. When water is added to heated copper sulfate crystals, the copper sulfate undergoes a chemical reaction where it dissolves in the water to form a solution. This is a chemical change because the chemical composition of the copper sulfate is altered during the process.
What is meant by the word anhydrous when applied to a chemical?
Anhydrous simply means 'without water'. The opposite is a hydrated substance, in which salt crystals contain water as an integral part of the crystal. For example, anhydrous cobalt(II) chloride, CoCl2, is a blue powder. Add water and you form cobalt(II) chloride hexahydrate, CoCl2.6H2O, which is a pink colour. Anhydrous cobalt chloride can be used to test for the presence of water because of this dramatic colour change. In addition, hydrated copper(II) sulfate, CuSO4.5H2O, forms bright blue crystals. Heating them drives off the water of crystallisation and anhydrous CuSO4, a grey/white powder, is formed. Adding water will reform a blue solution of the hydrated salt.
