and a sodium hydroxide solution is added dropwise to adjust the pH of the system to 2-2.3. After 4-6 hours of reaction, concentrated hydrochloric acid is added dropwise to adjust the pH of the system to 1.5-3. Then, thiourea is added, and the mixture is ...
To solve the above technical problem, a technical solution adopted by the present invention is: to provide a method for preparing Dimethyl acetylenedicarboxylate, including the following steps: (1) Dissolve 2,3-dibromosuccinic acid in methanol, add concentrated sulfuric acid dropwise to the reaction ...
Well, the concentration of hydrochloric acid is TWICE that of the sodium hydroxide solution…and we know that [math]HCl(aq)[/math] and [math]NaOH(aq)[/math] react in a 1:1 molar ratio according to the equation… [math]HCl(aq) + NaOH(aq) ightarrow NaCl(aq) + H_{2}O[/math] ...
How is methane prepared in the laboratory ? Video SolutionText SolutionGenerated By DoubtnutGPT To prepare methane (CH₄) in the laboratory, we can follow these steps: 1. Gather Materials: - Sodium acetate (C₂H₃NaO₂) - Sodium hydroxide (NaOH) - Heat source (like a Bunsen burner...
Text SolutionGenerated By DoubtnutGPT The correct Answer is:BTo prepare isobutane, we can follow these steps: Step 1: Identify the starting materialThe starting material for the preparation of isobutane is 3-methylbutanoic acid. Step 2: Understand the decarboxylation processDecarboxylation is a ...
Neutralize any spills with sodium bicarbonate or similar compound. Remember, it's best to neutralize a strong acid with aweak baseand not astrong base. Prepare Aqua Regia Solution The usualmolarratio between concentrated hydrochloric acid and concentrated nitric acid is HCl:HNO3of 3:1. Keep in ...
Step 1: Prepare the Solution Pour water into a sizable bowl and mix in a spoonful of table salt. Turn on AquaPure and place it inside the bowl with the apples. The electrolysis process will start doing its magic. It typically takes about 10 minutes for it to finish. ...
How do you separate sand, sodium chloride, and ammonium chloride? Are sodium carbonate and sodium bicarbonate the same? Does sodium bicarbonate dissolve in water? Describe how to prepare a sodium bicarbonate-carbonate buffer solution with a pH of 10. ...
Phosphoric acid to make the pH more acidic orsodium hydroxideto make the pH more alkaline pH meter Glassware Hot plate with stirring bar Prepare the Phosphate Buffer Decide on the concentration of the buffer. If you make up a concentrated buffer solution, you can dilute it as needed. ...
How many grams of sodium chloride are needed to make 0.60 L of 2.3 M sodium chloride solution? You need to prepare a 0.25 M solution of NaCl, but you only need 50 mL of this solution. How many grams of NaCl would you need?