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this is done as so to avoid any errors in the reading you will get
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Why beaker used to collect solution should be dry?
Beakers that will be used to collect solutions should be completely dry before use due the possibility of water being able to dilute the solution that will be placed inside of the beaker. If a beaker is not completely dry before collection of a solution, an inacurracy in data results may occur.
Should we measure the mass of a beaker before measuring a chemical or powder inside the beaker?
You can do that or you can zero balance the scale with the empty beaker on it before adding the substance to be measured to the beaker.
How do you calculate non volatile matter percentage in a solution?
Non volatile matter = [(W2-W1)/V] x 100 where W2 :Weight of beaker [Before sample addition & evoporation] W1 :Weight of beaker [after sample evoporation] V : Volume of sample taken
What is the pH of pure water in the beaker before the acid is added?
7
Why do beaker need to cool before weighing?
A hot beaker warms the air around it, which causes it to rise. For very sensitive balances, the updraft produced can reduce the measured weight.
Why is it important to let the sand settle first at the bottom of the beaker before pouring the solution into another beaker?
It is important to let the sand settle at the bottom of your beaker so that the sand is separated from the liquid.
Why beaker used to collect solution should be dry?
Beakers that will be used to collect solutions should be completely dry before use due the possibility of water being able to dilute the solution that will be placed inside of the beaker. If a beaker is not completely dry before collection of a solution, an inacurracy in data results may occur.
Where should a thermometer be placed in a beaker?
Hold it by the top or use a clamp. But make sure before you take the temperature you stir the liquid around in the beaker first and that you do not let it touch the bottom of the beaker as the glass will be hotter than your liquid.
Should we measure the mass of a beaker before measuring a chemical or powder inside the beaker?
You can do that or you can zero balance the scale with the empty beaker on it before adding the substance to be measured to the beaker.
How do you calculate non volatile matter percentage in a solution?
Non volatile matter = [(W2-W1)/V] x 100 where W2 :Weight of beaker [Before sample addition & evoporation] W1 :Weight of beaker [after sample evoporation] V : Volume of sample taken
Why is it important for the solution to be clear before you attempt to measure its optical activity?
'cause, yo
Did Dani Harmer have any experience before Tracy Beaker?
no
Why is it recommended to pour some of the solution from the sample bottle into a separate beaker before measurements are taken?
Most likely to avoid contamination, though it's hard for us to do your homework for you when you don't give complete information.
What is the pH of pure water in the beaker before the acid is added?
7
What do with your contacts you if you have no contact solution?
Put them in clean water, but be sure to soak them in solution before putting them in your eyes again. This is important because the solution kills germs but water does not. It is very important to have contact solution always. If you run out and too broke to buy another bottle, then go to your optometrist. He/she will be glad to give you a trial bottle.
Why sodium hydroxide is dissolved in a little water in a beaker before transferring it into volumetric flask?
The dissolution of sodium hydroxide in water is very exothermic. One might worry the solution may boil out of the volumetric flask and cause a hazardous situation. Volumetric flasks are also fairly thin compared to a beaker and aren't designed to take much heat, if any
Why should you remove the beaker from the balance before mixing the two reactants?
Because, if you mix the two reactants while the beaker is on the balance than the world will explode into a gigillian pieces!!
