30 de puncte pentru:Se amesteca 200g solutie zahar de C1=80%cu 6008 solutie de zahar de C2=20%cu 800g solutie zahar de C4=43%
a)Care este masa totala de zahar dizolvata
b)Care este C-ul final.

ms1=200g

c1=80%

ms2=600g

c2=20%

ms3=800

c3=43%

a)md(total)?

b) C(final)

C/100=md/ms

80/100=md/200=> md= 80×200/100=> md1=160 g

20/100=md/600=>md=20x600/100=>md2=120 g

43/100=md/800=>md=43x800/100=>md2=344 g

md(final)=md1+md2+md3

md(final)=160+120+344=624 g

ms(final)=ms1+ms2+ms3

ms(final)=200+600+800=1600 g

C(final)/100=md(final)/ms(final) ==> C(final)= 100 x 624 / 1600 ==> C(final)=39%

ms1=200g

c1=80%

ms2=600g

c2=20%

ms3=800

c3=43%

a)md(total)?

b) C(final)

C/100=md/ms

80/100=md/200=> md= 80×200/100=> md1=160 g

20/100=md/600=>md=20x600/100=>md2=120 g

43/100=md/800=>md=43x800/100=>md2=344 g

md(final)=md1+md2+md3

md(final)=160+120+344=624 g

ms(final)=ms1+ms2+ms3

ms(final)=200+600+800=1600 g

C(final)/100=md(final)/ms(final) ==> C(final)= 100 x 624 / 1600 ==> C(final)=39%

Eu asa am facut rezolvarile.