2021年黑龙江大庆中考化学试卷

3232425222323222中考真题图像清晰32324252223232222021年龙江大庆中化学试卷一选题1ABCD2A

B

C

D3A

B

C

4ABC8D5

A

C

KNO

B

Mg

SO

AgNOC

O

2

KO

MgSO

6ACHOH3O

2CO3HOBAl23+2AlCl+2OC2Fe424)3+3CuDCu(OH)2CO2CuCl+23O7ABCD

KNOCOMnOFeClCuCl

223123232222中考真题图像清晰word版2231232322228图甲

图乙

图丙

图丁ACa(OH)COBCD20NaCl9bcAtBtbCt15gbc50gDttb10AB1+HO

CO+HC2D3NH14∶二填题________2__________________________310HN________4________5Ca(HPO2____________6____________

中考真题图像清晰word版可编辑121①________22O22________3D2____a422B________________________________131________________2________3____________________________________4

________5MgSnPbCu____

23中考真题图像清晰word版可编2314CuCl1Y________2CuCl________3_2+_2SO3+2O=CuCl+NaCl+_244________5_1517F1_________2A________3F[2Ca(ClO)2A4D________三实题16COFeCO1A___________________________________2____________________________________________32________AD

22中考真题图像清晰word版可编辑224________________________________________________________5COO3_________________________________________________________________________________6E________________________EFa____bc17MgCOCO①②2CO3CaCl2ACO2CO21COCO________C_______22________CO

3________________________________________1____________41________________________________________52____________632________________________________________________________________________________________________

中考真题图像清晰word版可编辑7________8Na2__________________________________________四计题1850.0g20.0%7.8g3+2+2H1B____________2A________________________320.1%

3232425222323222中考真题图像清晰32324252223232222021年黑龙江庆中考化试卷答案一选题1BABCD2DA

B

C

D3CA

B

C

4AABC8D5B

A

C

KNO

B

Mg

SO

AgNOC

O

2

KO

MgSO

6AACHOH3O

2CO3HOBAl23+2AlCl+2OC2Fe424)3+3CuDCu(OH)2CO2CuCl+23O7BABCD

KNOCOMnOFeClCuCl

223123232222中考真题图像清晰word版2231232322228D图甲

图乙

图丙

图丁ACa(OH)COBCD20NaCl9bcCAtBtbCt15gbc50gDttb10DAB1+HOCO+HC2D3NH14∶二填题分2__________________________310HN

8∶

4

蛋质

5Ca(HPO2

6

吸

2中考真题图像清晰word版可编辑2121①铁架22O22

A

3D2

bb422B

氢关活，开塞131

得

78.962电层数3

HCHO+

CO22O4

Fe5MgSnPbCu

3

323中考真题图像清晰word版可编32314CuCl1Y

过

2CuCl+1322+1Na2SO+H2O=CuCl21244

NaCl5

隔水

1517F1

2B

CaCO

2A

正3F[2Ca(ClO)2A

Cl2+Ca(OH)2=Ca(ClO)+CaCl2+H24D

放

三实题16COFeCO1A

检装的密

232

A

CO2+2NaOH==Na2CO3+2OAD

22中考真题图像清晰word版可编辑224吸收氢化溶中出水气5COFe2O3中璃内色体成黑E中澄的灰变浊D3CO+FeO3

2Fe+3CO26EEFac

吸一化

17MgCOCO①②2CO3CaCl2ACO2CO21CO2CO氯氢

C浓硫22CO

碳

3

反物不有元，能成氧钠12CO341碳酸溶也碱性也使酞红52Na2CO3632

检并除碳钠

Na2CO3+CaCl2═3↓+

2322中考真题图像清晰word版可编辑23227

二

8Na2

4Na+3CO

2Na2CO3+C四计题1850.0g20.0%7.8g3+2+2H1BNaClNaAlO22A（120，13.6）

320.1%解设氢化反的氧钠液质为x。Al(OH)

+NaOH═NaAlO2

+78407.8gx所氢化溶的量4g÷20.0%=20g，中A点横坐是140－=120。设氯铝应氢化的量y3NaOH+AlCl

3

3↓

+3NaCl12078y7.8g消氢化溶的量12g÷=6