Ch3cooh+ca(oh)2= ch3cooh+hcl= ch3cooh+na2o= ch3cooh+k2co3=

ch3cooh+ca(oh)2=(сh3coo)2ca+2h2o;

ch3cooh+hcl=ch3coocl+h2;

ch3cooh+na2o=2ch3coona+h2o;

ch3cooh+k2co3=ch3cook + h2co3  => (co2  + h2o)

m(чист.hcl)=65г*0.2=13г

n(hcl)=13г/36г/моль=0.36моль

n(h2)=0.36/2= 0.18моль

v(h2)=n*vm=0.18моль*22.4л/моль=4.032л

ответ: 4л

а) cr(oh)3+3hbr=crbr3+3h2o

cr(oh)3+3h+3br=cr+3br+3h2o

cr(oh)3+3h=cr+3h2o

б)3naoh+h3po4=na3po4+3h2o

3na+3oh+3h+po4=3na+po4+3h2o

oh+h=h2o