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Chemistry, 22.06.2019 18:00
Answer asap need to be answered by wednesday morning explain how a buffer works, using an ethanoic acid / sodium ethanoate system including how the system resists changes in ph upon addition of a small amount of base and upon addition of a small amount of acid respectively. include the following calculations in your i. calculate the ph of a solution made by mixing 25cm3 0.1m ch3cooh and 40cm3 0.1m ch3coo-na+. [ka = 1.74 x 10-5 m] ii. calculate the ph following the addition of a 10cm3 portion of 0.08 m naoh to 500cm3 of this buffer solution. iii. calculate the ph following the addition of a 10cm3 portion of 0.08 m hcl to 200cm3 of the original buffer solution.
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Chemistry, 23.06.2019 14:30
If energy was included in a chemical reaction, on which side of the equation would it be written for an endothermic reaction?
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Chemistry, 23.06.2019 15:40
The table below shows the freezing points of four substances. substance freezing point (Ā°c) benzene 5.5 water 0 butane ā138 nitrogen ā210 the substances are placed in separate containers at room temperature, and each container is gradually cooled. which of these substances will solidify before the temperature reaches 0Ā°c? benzene water butane nitrogen
Answers: 2
A mixture can be separated into simpler parts based on the components of the mixture's properties....
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