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Color change of phenolphthalein with acid and alkali Color change of purple litmus test solution with acid and alkali
Phenolphthalein does not change color with acid and becomes red with alkali
Purple litmus solution turns red with acid and blue with alkali
1LSB Don't be misled
What is the colour of purple litmus and colorless phenolphthalein with acid and alkali salt? RT
Purple litmus turns red with acid and blue with alkali, turns blue with alkaline salt and does not change color with neutral salt.
Colorless phenolphthalein is not changed with acid, alkali, alkaline salt and neutral salt.
The purple litmus turns red with acid and blue with alkali, turns blue with alkaline salt and does not change color with neutral salt.
Colorless phenolphthalein is not changed with acid, alkali, alkaline salt and neutral salt.
RELATED INFORMATIONS
- 1. Reaction of Copper with Concentrated Sulfuric Acid Copper is heated with concentrated sulfuric acid and 4.9g sulfuric acid is reduced in the reaction. (1) Volume of gas generated under standard condition (2) The solution after the reaction was prepared into a solution of 500 ml, and the amount and concentration of the substance in the solution were obtained Reaction of copper with concentrated sulfuric acid Copper is heated with concentrated sulfuric acid and 4.9g sulfuric acid is reduced in the reaction. (1) Volume of gas generated in standard condition (2) The solution after the reaction was prepared into a solution of 500 ml, and the amount and concentration of the substance in the solution were obtained Reaction of copper with concentrated sulfuric acid Copper is heated with concentrated sulfuric acid and 4.9g sulfuric acid is reduced in the reaction. (1) Volume of gas generated under standard condition (2) The solution after the reaction was prepared into a solution of 500 ml, and the amount and concentration of the substance in the solution were obtained
- 2. Dilute nitric acid and copper shall be heated. Dilute nitric acid and copper shall be heated
- 3. Does the reaction of copper with nitric acid require heating
- 4. What's the gas that makes the moist red litmus blue?
- 5. Is ammonia tested with wet purple litmus paper or wet red litmus paper? Can you use wet PH test paper?
- 6. What does the red litmus turn blue and the blue litmus turn red, respectively
- 7. Can the reaction of copper with concentrated sulfuric acid be written as an ion equation
- 8. Ion Equation for the Reaction of Concentrated Sulfuric Acid with Copper
- 9. A sufficient amount of copper was reacted with 50ml 18mol / L sulfuric acid under heating conditions, and after the reaction was stopped, the amount of reduced H2SO4 was A.0.45mol B.0.45~0.9mol C.0.9mol D.<0.45mol
- 10. To 50 ml of 18 mol/L concentrated sulphuric acid, add sufficient copper flakes to heat to produce a volume of SO2 gas under standard conditions,=20.16, or =10... To 50 ml of 18 mol/L concentrated sulfuric acid, add a sufficient amount of copper sheet to heat to produce a volume of SO2 gas in the standard case,=20.16,=10.08, or >10.08 and To 50 ml of 18 mol/L concentrated sulphuric acid, add sufficient copper flakes to heat to produce a volume of SO2 gas under standard conditions,=20.16, or =10... To 50 ml of 18 mol/L concentrated sulfuric acid, add a sufficient amount of copper sheet to heat to produce a volume of SO2 gas in the standard case,=20.16,=10.08, or >10.08, and To 50 ml of 18 mol/L concentrated sulphuric acid, add sufficient copper flakes to heat to produce a volume of SO2 gas under standard conditions,=20.16, or =10... To 50 ml of 18 mol/L concentrated sulphuric acid, add a sufficient amount of copper sheet to heat to produce a standard volume of SO2 gas,=20.16,=10.08, or >10.08 and
- 11. Determination of Color-Changing Range of Chemical Indicator Methyl Orange Phenol Phthalate Purple litmus Study on that color change range of methyl orange phenolphthalein purple litmus
- 12. 1 Color change range of common indicators: methyl orange () phenolphthalein () litmus ()
- 13. Among the following reagents, salt solution, sodium hydroxide solution and dilute sulfuric acid can be identified as () A dilute hydrochloric acid B colorless phenolphthalein C litmus test solution D limestone Why?
- 14. Phenolphthalein is added dropwise in sodium hydroxide solution. Add hydrochloric acid dropwise, the phenomenon is.
- 15. What about dilute hydrochloric acid and dilute sulfuric acid with purple litmus solution and colorless phenolphthalein solution, respectively Answer separately above
- 16. 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.
- 17. 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?
- 18. 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
- 19. 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?
- 20. 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