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What happens when baking soda is mixed with white vinegar, is it a physical or chemical change
It's a chemical change CO2 and sodium acetate
Is the acid-base indicator acid-base discoloration or litmus and phenolphthalein discoloration?
Is litmus and phenolphthalein acid and alkali indicator discoloration.
The acid-base indicator is generally a weak organic acid or organic base, and its acid formula should have a significantly different hue compared with its conjugate basic formula. When the pH of the solution changes, the indicator loses the proton to change from acid formula to basic formula, or the proton to change from basic formula to acid formula. Due to the change in structure, the color of the indicator changes.
Is litmus and phenolphthalein and other acid and alkali indicator color change.
The acid-base indicator is generally a weak organic acid or organic base, and its acid formula should have a significantly different hue compared with its conjugate basic formula. When the pH of the solution changes, the indicator loses the proton to change from acid formula to basic formula, or the proton to change from basic formula to acid formula. Due to the change in structure, the color of the indicator changes.
RELATED INFORMATIONS
- 1. Which can be used as acid-base indicator? (Except litmus and phenolphthalein)
- 2. Color change range of methyl orange, phenolphthalein and litmus
- 3. 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?
- 4. 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
- 5. 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
- 6. What color do litmus and phenolphthalein come from when they encounter acid - base solutions.
- 7. 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.
- 8. Al reacts with NaOH, NaAlO2 reacts with HCl, and Al reacts with NaO. Write their chemical reaction equations
- 9. It is proved that the chemical reaction between CO2 and NaOH must have occurred. Why can it be proved by adding HCl?
- 10. 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
- 11. Is sodium carbonate or sodium bicarbonate (and hydrochloric acid) used in the laboratory for carbon dioxide production
- 12. Someone eats barium chloride by mistake and causes poisoning, if take sodium sulfate solution in time can detoxify, reason (write chemical equation) Also why not take sodium carbonate (ibid.) Some people mistakenly eat barium chloride and cause poisoning. If you take sodium sulfate solution in time, you can detoxify it. Also why not take sodium carbonate (ibid.)
- 13. How to prepare 0.2mol hydrochloric acid solution 1000ml
- 14. When preparing 1000ml 0.2mol /L hydrochloric acid solution, take 36.5%(1.19g/mol) of concentrated hydrochloric acid in milliliters When preparing 1000ml 0.2mol / L hydrochloric acid solution, take 36.5%(1.19 g/mol) of concentrated hydrochloric acid in milliliters
- 15. Acetic acid acetic acid increases the concentration of acetate ion Why does zinc react with hydrogen ions? The ionization of acetic acid increases the concentration of acetate ion Why does zinc react with hydrogen ions?
- 16. What is the degree of ionization of acetic acid at different concentrations? Why? Why is the degree of thin ionization large? What formula? What force? What is the degree of ionization of acetic acid at different concentrations? Why? Why? Why is the degree of thin ionization large? What formula? What force?
- 17. Ionization equation of magnesium oxide mixed with dilute hydrochloric acid 1 Ionization equation of magnesium oxide mixed with dilute hydrochloric acid
- 18. Ionization equation of iron and hydrochloric acid What if there is only one element H2? And barium hydroxide and sulfuric acid. Ionization equation of iron and hydrochloric acid What if there's only one H2? And barium hydroxide and sulfuric acid.
- 19. Is acetic acid ionized or hydrolyzed? Is acetic acid ionized or hydrolyzed?
- 20. Ch3cooh and caco3 ionization equations Caco3+2CH3COOH=Ca (CH3COO)2+CO2↑+H2O Write the ionization equation