![ansver](/tpl/images/cats/User.png)
Answers: 1
![](/tpl/images/ask_question.png)
![](/tpl/images/ask_question_mob.png)
Another question on Chemistry
![question](/tpl/images/cats/himiya.png)
Chemistry, 22.06.2019 01:20
1. suppose a reaction mixture, when diluted with water, afforded 300 ml of an aqueous solution of 30 g of the reaction product malononitrile [ch2(cn)2], which is to be isolated by extraction with ether. the solubility of malononitrile in ether at room temperature is 20.0 g/100 ml, and in water is 13.3 g/100 ml. what weight of malononitrile would be recovered by extraction with (a) three 100-ml portions of ether and (b) one 300-ml portion of ether? suggestion: for each extraction, let x equal the weight extracted into the ether layer. in part (a), the concentration in the ether layer is x/100 and in the water layer is (30 x)/300; the ratio of these quantities is equal to k 20/13.3.
Answers: 2
![question](/tpl/images/cats/himiya.png)
![question](/tpl/images/cats/himiya.png)
![question](/tpl/images/cats/himiya.png)
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.
Answers: 3
You know the right answer?
How do ampullae help sharks find prey in murky water...
Questions
![question](/tpl/images/cats/biologiya.png)
Biology, 30.11.2021 14:00
![question](/tpl/images/cats/en.png)
English, 30.11.2021 14:00
![question](/tpl/images/cats/obshestvoznanie.png)
Social Studies, 30.11.2021 14:00
![question](/tpl/images/cats/biologiya.png)
Biology, 30.11.2021 14:00
![question](/tpl/images/cats/fizika.png)
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/en.png)
English, 30.11.2021 14:00
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/informatica.png)
Computers and Technology, 30.11.2021 14:00
![question](/tpl/images/cats/mat.png)
Mathematics, 30.11.2021 14:00
![question](/tpl/images/cats/health.png)
![question](/tpl/images/cats/en.png)
English, 30.11.2021 14:00
![question](/tpl/images/cats/mat.png)
Mathematics, 30.11.2021 14:00
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 30.11.2021 14:00
![question](/tpl/images/cats/en.png)
English, 30.11.2021 14:00
![question](/tpl/images/cats/informatica.png)
Computers and Technology, 30.11.2021 14:00
![question](/tpl/images/cats/mat.png)