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During the following chemical changes: XHCl YNaOH The substance represented by Z, X may be () A. Cu B. AgNO3 C. Ba (OH)2 D. CuO
When A and X are copper, copper does not react with hydrochloric acid, so the selection is incorrect. When B and X are silver nitrate, silver nitrate reacts with hydrochloric acid to form silver chloride white precipitate and nitric acid. When nitric acid reacts with sodium hydroxide to form sodium nitrate and water, the selection is correct. When C and X are Ba (OH)2, Ba (OH)2 and hydrochloric acid...
When A and X are copper, copper does not react with hydrochloric acid, so the selection is incorrect. When B and X are silver nitrate, silver nitrate reacts with hydrochloric acid to form silver chloride white precipitate and nitric acid, and nitric acid reacts with sodium hydroxide to form sodium nitrate and water, so the selection is correct. When C and X are Ba (OH)2, Ba (OH)2 and hydrochloric acid...
Hydrochloric acid is added to the NaOH,Na2CO3, mixture if the amount of NaOH,Na2CO3,HCl substance is x, y, z, respectively (1) Calculate the amount of NaCl substance in the solution after the reaction (A) (2) It is known that Na2CO3 reacts with HCl according to the following formula: Na2CO3+HCl=NaHCO3+NaCL NaHCO3+HCl=NaCl+CO2↑+H2O Calculate the amount of carbonate ions in the solution after the reaction (B)
Anyway, if you look at the equation NaOH+HCl=NaCl+H2ONa2CO3+HCl=NaHCO3+HCl=NaCl+CO2↑+H2O, the return path of the last Cl is 1 or combined with H+, and HCl2 and Na+ pair to form NaCl, so 1 when HCl is excessive and appropriate, i.e. z≥x+2y, then the amount of NaCl' is from the angle of Na+...
RELATED INFORMATIONS
- 1. Demonstrate chemical reaction between CO2 and NAOH Conclusion of experimental phenomenon 1. Pass CO2 into NAOH solution without obvious phenomenon. The CACO3 generated in the second step of the reaction is 2. Take the solution obtained from the above experiment and prove that the chemical reaction occurs when white precipitation occurs. In the test tube, drop the calcium chloride solution 3. Drop HCL into the white precipitate. What is the deficiency of this experiment? Conclusion of experimental phenomenon 1. Pass CO2 to CACO3 in the second step of reaction formation without obvious phenomenon in NAOH solution, 2. Take the solution obtained from the above experiment to form white precipitate, indicating that there is carbonate new product in reaction 1. In a test tube, the formation of a calcium chloride solution drops in, proving that chemistry occurs 3. Drop HCL white precipitate into white precipitate to dissolve and react There are bubbles.
- 2. What can react with both HCl and NaOH?
- 3. H2SO4 is required to neutralize a certain amount of NaoH 1 Mol, if hydrochloric acid is used instead, the amount of Hcl in hydrochloric acid shall be used
- 4. If mg a% caustic soda solution and ng a% dilute sulfuric acid solution are mixed and the litmus test solution is still purple, the numerical relationship between m and n is correct () A.m=n B.m > n C.m < n D. Inability to judge
- 5. Why does the indicator use phenolphthalein solution instead of litmus solution in the experiment of neutralization reaction of sodium hydroxide solution and dilute hydrochloric acid? Why does the indicator use phenolphthalein solution instead of litmus solution in the neutralization reaction of sodium hydroxide solution and dilute hydrochloric acid?
- 6. The following substances can not distinguish dilute hydrochloric acid from sodium hydroxide solution: A purple litmus B colorless phenolphthalein C sodium chloride solution D zinc particles
- 7. Excuse me why litmus test solution can not be used as indicator in acid-base neutralization titration, but phenolphthalein can I know because its color range is too large, not accurate, but its color range is pH 5.0-8.0, and phenolphthalein is 8.10.0, in the alkali solution is more accurate than litmus ah, why can not be used?
- 8. Application method and phenomenon of acid - base indicator, such as colorless phenolphthalein test solution, purple litmus test solution, etc. Application method and phenomenon of acid - base indicator. such as colorless phenolphthalein test solution, purple litmus test solution, etc.
- 9. What about dilute hydrochloric acid and dilute sulfuric acid with purple litmus solution and colorless phenolphthalein solution, respectively Answer separately above
- 10. Phenolphthalein is added dropwise in sodium hydroxide solution. Add hydrochloric acid dropwise, the phenomenon is.
- 11. It is proved that the chemical reaction between CO2 and NaOH must have occurred. Why can it be proved by adding HCl?
- 12. Al reacts with NaOH, NaAlO2 reacts with HCl, and Al reacts with NaO. Write their chemical reaction equations
- 13. Color after adding phenolphthalein and litmus test solution to acid and alkali salt Must have color Color after adding phenolphthalein and litmus test solution to acid and alkali salt Must have color.
- 14. What color do litmus and phenolphthalein come from when they encounter acid - base solutions.
- 15. Must alkali make purple litmus test solution turn blue, colorless phenolphthalein test solution turn red Alkali can make purple litmus test solution blue, colorless phenolphthalein test solution red
- 16. The egg white drops into the purple litmus in blue and the colorless phenolphthalein solution in red. The PH of the egg white may be ( 1-3 Is A 4-6 is B 7 is C 8-11 is D
- 17. Colorless phenolphthalein, purple litmus acid and alkali neutral what color? Is there anything else that can test for acid-base properties? Colorless phenolphthalein, purple litmus acid and alkali neutral what color? Is there anything else that can test for acid and alkali?
- 18. Color change range of methyl orange, phenolphthalein and litmus
- 19. Which can be used as acid-base indicator? (Except litmus and phenolphthalein)
- 20. What happens when baking soda is mixed with white vinegar, is it a physical or chemical change