【附20套名校中考真题?019年中考化学真题分类汇编:考点34-工艺流程(含答? - 百度文库

ʴΪN2SO3HNO3OHCl ݻᡢΡʵĶش

ʵķصĻѧ֪ʶȴѧϰѵ֮һҪȷءضȷ࣬Ҫʷйظץס໥ϵͱ 18.𰸡 п B һ̼ CO2+2NH3

CONH22+H2O

⣺1ͨȥˮеʣõˮΪ̶ߣ̿ɶ׽ṹԣ

2ȱij΢Ԫػʳٻ΢ԪпԪأ

3ȼյ֪ԭƻȼķǣAµŻ£BCȼƾƺ󣬱õñϨҪԭǸ

4һ̼о綾ѪҺѪ쵰׽ʹȱϢ 5̼ͰһغˮѧʽΪCO2+2NH3NH22+H2O ʴΪ 1 2п 3B 4һ̼ 5CO2+2NH3

CONH22+H2O

CO

1ݢٹˢ۾óֲԽзݻ̿Ľṹз2΢Ԫصýз 3ԭз 4һ̼ĶԽз 5ݷӦдѧʽ

Ҫ˲ľ̿ԡ΢Ԫء𷽷ѧʽд֪ʶӦ֪ʶǽĿĹؼ 19.𰸡261 41 46 4.8

1Ҵ2̼ԭӡ6ԭӺ1ԭӹɵģ⣺1ҴCHOԭӸΪ261

216=41 2Ҵ̼ԪغԪصΪ122+16+16=46 3ҴԷΪ12

49.2gҴк̼ԪصΪ9.2gʴΪ 1261 241 346 44.8

11ҴӵĹɣз

2ݻиԪ=ԭӵԭԭӸ֮ȣз𡣣3ԷΪɷӵĸԭӵԭ֮ͣз 4ݻijԪص=ûԪصз ѶȲ󣬿ͬѧǽϢûѧʽĺйؼз⡢

20.𰸡⣺ɵƵΪ71g10%=7.1g

þΪxƵΪyþΪz 2NaOH+MgSO4=Na2SO4+MgOH2 80 120 142 58 y x 7.1g z =

=

=

100%=4.8g

x=6g y=4g

z=2.9g

ҺΪ71g+2.9g-6g=67.9g ҺʵΪ

100%5.9%

ҺΪ

64.1cm3=64.1mL

𣺣1ƷþΪ6g

2Һʵ5.9% 3ҺΪ64.1mL

ƵͶӦĻѧʽþԼƺþӦݡ

ݻѧʽʱһҪȷдѧʽڶҪʹȷݣҪ 21.𰸡C+O2

CO2 CaCO3

CaO+CO2 NaHCO3+HCl=NaCl+H2O+CO2

⣺1̼ȼɶ̼ӦĻѧʽΪC+O2

CO2

2ʯʯƺͶ̼ӦĻѧʽΪCaCO3

CaO+CO2

3̼ϡᷴӦȻơˮͶ̼ӦĻѧʽΪNaHCO3+HCl=NaCl+H2O+CO2 ʴΪ 1C+O2

CO2

2CaCO3CaO+CO2

3NaHCO3+HCl=NaCl+H2O+CO2

ȸݷӦԭҳӦӦݻѧʽд裨д䡢עȣдɡ

ѶȲ󣬿ѧݷӦԭдѧʽѧʽдֵĴвϿ͹ʵغ㶨ɡдŵȡ 22.𰸡F MgF2 C

⣺1ͼТٴԪطFþڽԪء F

2ɷþԪɻǷþþԪػϼ+2Ԫػϼ-1ݻԪػϼ۴Ϊ֪þĻѧʽΪMgF2 MgF2

3ԭӽṹʾͼУþԭӵĻѧƵCΪǵȡ C

4þԪصԭӺӲ3Ԫڱڵڡ 

ԪڱУϽԭϽԪطţмԪƣԭ

ԭУ˵===ԭ

⣬ԪصƶԣǽԪصƲԣ Ԫػϼ۴Ϊ㣻

ԭӺӲǼھǼ

һ£С4ģӦʧȥӣ4ķӦ׵õӣ4ģȲ׵õӣҲʧȥӣȵԪػѧƣ8һȶṹһҲʱﵽ2Ҳһȶṹ

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