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As the acid in beaker A is added to the base in flask B the number of OH ions in flask B?
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∙ 12y ago
Decreases
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∙ 12y ago
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What is the pH of pure water in the beaker before the acid is added?
7
What precautions should be taken when using 6.0m HCl?
1.) Safety glasses to shield your eyes from any contact with acid 2.) Pouring the solution ( into maybe a conical flask, beaker etc.) at eye level to avoid spillage.
How do clean a beaker?
Acid washing it should do. I assume you are in a lab...in which case a 1:1 Hydrochloric Acid solution can be poured into the flask. DON'T FORGET TO PUT GOGGLES AND GLOVES ON. Put the lid on. Shake the flask and turn it to ensure all surfaces of the glass inside are being washed with the acid. Then, give it a good triple rinse with de-ionized water. If you are just at home, pour in some white vinegar and let it sit for a while. That should break up anything that's inside.
In the preparation of aspirin water is added to the reaction flask Why?
The formation of aspirin will proceed faster if acetic anhydride is used in place of acetic acid. However, acetic anhydride will hydrolyze in the presence of water to form acetic acid, slowing down the reaction.
What is the substance remaining in the beaker after evaporaiting the excess acid of hydrochloric acid with manganese?
This compound is the manganese dichloride.
What is the precaution step of acid base titration?
1.The beaker,pipette and the flask should be washed properly with distilled water. 2.Pipetting has to be accurate in order to avoid excess addition of the titrating agent. 3.The flask containing the indicator (phenolphthalein or methyl orange) must be shaken well while acid is added to it. 4.The acid should be added dropwise. 5.Contamination should be avoided. 6.Excess of indicator should not be used. 7.The flask into which acid is added dropwise should be removed as soon as the indicator changes color. 8.Readings should be taken avoiding the parallox error.
What happens to the pH in the beaker as the acid is added?
The pH drops. The stronger the acid the lower the pH.
What is the pH of pure water in the beaker before the acid is added?
7
Zinc is added to a beaker containing hydrochloric acid and the beaker gets warm. What type of reaction is this?
Exothermic, because energy is released.
Why the Erlenmeyer flask does not have to be dry and why water may be added after the 25.00-centimetre Cube of Acid has been pipetted in?
?
A flask contains 300.0cm3 of a 0.500 acid solution How many moles of the pure acid must have dissolved?
All of the moles of pure acid will have dissolved in the flask.
Why is sulfuric acid added to the dilute bleach and iodide in the conical flask during titration of sodium hypochlorite with sodium thiosulphate?
to acidify the solution
What are the Laboratory techniques on mixing water and acid?
Mixing water and acid is very exothermic. Potentially enough heat is generated to cause the water to instantly vaporize, which can result in splattering (and messing up any volume calculations you may have already done). For this reason, ALWAYS add acid to water, NOT the other way around. The water acts as a heat sink and can absorb any heat that is generated. For best results, add the acid slowly while gently swirling the flask/beaker of water. You can also submerge the water flask/beaker into an ice bath.
How does pH change when an acid is added to a base?
The pH lowers from around 14 to a lower number as acid is added.
Hydrochloric acid is added to a beaker containing a piece of zinc As a result zinc chloride is formed as hydrogen gas is released This is an example of what?
chemical reaction
If A scientist pours 3.48 ML of hydrochloric acid into a beaker How many liters of hydrochloric acid did the scientist pour into the beaker?
0.0038 liters
What precautions should be taken when using 6.0m HCl?
1.) Safety glasses to shield your eyes from any contact with acid 2.) Pouring the solution ( into maybe a conical flask, beaker etc.) at eye level to avoid spillage.
