andrew6494
07.05.2021 •
Chemistry
Kiana rides her skateboard with a constant speed of 6 km/h. How long will she take to travel a distance of 10 kilometers?
Solved
Show answers
More tips
- W Work and Career Where can you learn to be a flight attendant?...
- C Cities and Countries What time does the Metro open in Moscow?...
- S Style and Beauty How to Get Rid of Under Eye Bruises?...
- F Food and Cooking How to Calculate the Gender of Your Child with Blood?...
- C Computers and Internet IMHO: What is it, why is it important, and how to use it?...
- H Health and Medicine Effective Ways to Treat Colic in Infants...
- H Health and Medicine How to Treat the Flu: A Comprehensive Guide...
- S Style and Beauty 5 Tips for Choosing the Best Ugg Boots...
- C Computers and Internet How to Create a Folder on Your iPhone?...
- C Computers and Internet iPhone SMS Delivery Report: How to Set It Up...
Answers on questions: Chemistry
- C Chemistry Identify the combination reaction. c4h12 + 7o2 ⟶ 6h2o + 4co2 2h2 + o2 ⟶ 2h2o al2s3 ⟶ 2al + 3s cl2 + 2kbr ⟶ 2kcl + br2...
- C Chemistry HCl + Fe?ra gì hihihihi...
- C Chemistry CH2– CH2– CH – CH2 - CH2. -CH3...
- C Chemistry 8.2 14,5 g of iron reacts with 12 g of water during a corrosion reaction to form Fe3O4 and H2, according to the following equation.Fe + H2O + Fe3O4 + H28.2.1 Balance...
- C Chemistry Characteristics of crystal...
- C Chemistry Need help with the question I uploaded...
- C Chemistry Use the specific heat values to answer the following questions. Which of the following has the smallest heat capacity?...
- C Chemistry A 40.0-mL sample of 0.100 M HNO2 (Ka = 4.6 x 10-4 .) is titrated with 0.200 M KOH. Calculate: a. the pH when no base is added b. the volume of KOH required to reach...
- C Chemistry 2.0 L HC2H3O2 (acetic acid) is made by diluting 75. mL of 17.6M acetic acid. What is the molarity of the new solution ?...
- C Chemistry A student placed 11.5 g of glucose (C6H12O6) in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until...
Ответ:
tis is a math question
Explanation:
Ответ:
AI(NO₃)₃ → Acidic pH < 7
CH₃NH₃CN → Neutral pH = 7
NaCIO → Basic pH > 7
CH₃NH₃CI → Acidic pH < 7
NaNO₃ → Neutral pH = 7
Explanation:
First of all we dissociate the salts:
Al(NO₃)₃ → Al³⁺ + 3NO₃⁻Nitrate anion comes from the nitric acid which is strong, so the anion is the conjugate weak base. It does not react to water, but the Al is an special case. Aluminum as a cathion comes from the Al(OH)₃ which is a base but this compound can also react as an acid, it is called amphoterous.
Al³⁺ + H₂O ⇄ Al(OH)²⁺ + H⁺
Aluminium cathion reacts to water in order to produce a complex and to give protons to the medium, so the salt is acid.
CH₃NH₃CN → CH₃NH₃⁺ + CN⁻Both ions come from a weak base and a strong acid, so both ions are the conjugate strong base and acid, respectively. They can make hydrolysis to water so the salt is neutral.
CH₃NH₃⁺ + H₂O ⇄ CH₃NH₂ + H₃O⁺ Ka
CN⁻ + H₂O ⇄ HCN + OH⁻ Kb
NaCIO → Na⁺ + ClO⁻Sodium cathion, comes from the strong base NaOH so it is does not react to water. It is the conjugate weak acid. Hypochlorite comes from the weak acid, so it can hydrolyse to water.
ClO⁻ + H₂O ⇄ HClO + OH⁻ Kb
Hypochlorous acid is formed giving OH⁻ to medium, so the salt is basic.
CH₃NH₃CI → CH₃NH₃⁺ + Cl⁻Chloride comes from the strong acid HCl. It does not react to water.
Methylammonium comes from the weak base, methylamine so it can react to water in order to make hydrolysis. The salt will be acidic.
CH₃NH₃⁺ + H₂O ⇄ CH₃NH₂ + H₃O⁺ Ka
NaNO₃ → Na⁺ + NO₃⁻
Both ions come from a strong base and acid, so they are the conjugate base and acid, respectively. As they do not make hydrolisis in water, the salt will be neutral.