When apples that have been cut are exposed to oxygen, an enzyme-catalyzed reaction causes them to turn brown. Explain why coating them with lemon juice (pH 3.5) as soon as they are cut prevents the color change.

Q: . If you breathe too rapidly (hyperventilate), the concentration of dissolved CO2 in your blood…

A: Hyperventilation, sustained abnormal increase in breathing. During hyperventilation the rate of…

Q: Write the chemical equation for the reaction of washing soda, Na2CO3, with HCl

A: Washing soda (Na2CO3) react  to Hydrochloric acid to each other and they form Sodium Chloride salt.…

Q: A lake has been acidified to a pH of 4.418. If the lake has a volume of 1.48×105 cubic meters, what…

A: pH is termed as the presence of hydronium ion in a known solution. As the potential increases for…

Q: What is the number of moles of 10.0 g NH₄Cl?  What is the molar concentration of NH₄Cl?  What is…

A:

Q: A0.14 M aqueous solution of sodium dihydrogen phosphate, Nall, PO4, has a pH of 4.03. Calculate Ka…

A: The hydrolysis of sodium dihydrogen phosphate is as follows,

Q: A solution of 0.20 M hydrazoic acid has a pH of 3.21. What is the Ka of hydrazoic acid?

A: We have to calculate the Ka of acid.

Q: how many moles of ammonium nitrate would be required to prepare .40 L of solution that is ph 5.40

A: NH3         +      HNO3     →       NH4NO3  weak base        strong acid            salt    Salt…

Q: pH

A:

Q: If you make a solution that is a 0.500 M solution of ascorbic acid (H2C6H6O6, pKa1 = 4.10, pKa2 =…

A:

Q: Hypochlorous acid, HClO, has a pKa of 7.54. What are [H3O+], pH, [ClO-], and [HClO] in 0.133 M HClO?

A: Please go through the below pic for the reaction taking place and Ka expression.

Q: In the following chemical equation indicate the reactant that is a Brønsted-Lowry acid HCN(aq) +…

A: Given, Chemical Reaction : HCN(aq) + H2O(l) ⇌ H3O+(aq) + CN-(aq)

Q: What is the pH of a solution containing both 0.10 M CH₃COOH and 0.20 M CH₃COONa? The Ka of CH₃COOH…

A: We have to predict the pH of the given solution.

Q: A substance with a pH of 6 has 1000 times fewer H* ions than a substance with a pH of 3. has 10…

A: We have to choose correct option for substance of pH 6.

Q: In the reaction HPO 2 (aq) + H20(1) PO,3-(aq) + H3O* (aq) HPO (aq) is the H20(1) is the PO43 (aq) is…

A:

Q: Complete the following equations, which show why each substance is a Brønsted-Lowry acid or base: a.…

A:

Q: What is the concentration of an aqueous HI solution that has a pH of 2.26? 1.82 x 103 M 5.50 x 10-3…

A: Given that, pH of HI = 2.26  Then, [HI] = ?

Q: Laundry detergent most often exhibits basic properties. Calculate the pOH of a sample of laundry…

A: Here, we are required to calculate the pOH of the laundry detergent in which the hydronium ion…

Q: What is the pOH of a solution that has a H3O+ concentration equal to 8.23 x 10-5 M at 25°C?

A: The sum of pH and pOH is equal to 14.  So from pOH value also we can know that the solution is…

Q: The bicarbonate buffering system in the blood can be represented as: CO2 (g) + H2O (l) HCO3 ̄ ((aq)…

A: Le chateliers principle help us to predict the direction of reaction on changing the concentration,…

Q: 6. A 0.495M solution of nitrous acid, HNO2, has a pH of 1.83. Find the percent ionization of nitrous…

A: Given: pH of the acid =1.83, Concentration of acid is = 0.495 M To find: Percent ionization of acid.…

Q: 5. For aqueous solutions of the following compounds, indicate whether they will be acidic, basic or…

A: Solution                                     Given that a) NaNO3 b) LiBr c) KOH d) NaNO2 e) KClO f)…

Q: Write the chemical equation for the hydrolysis reaction that explains why an aqueous solution of…

A: in hydrolysis reaction,  molecule of water is added to the substance.

Q: What are three primary standards, other than Na2CO3, that can be used to standardize acid solutions?…

A: Primary standards are reagents that are used for determining the concentration of the unknown.…

Q: In this reaction, which is the Brønsted- Lowry acid? B) C) A) H2O- OH + HI E) D)

A: According to the Bronsted Lowry concept , Acid gives H+ ion to the base.

Q: substance with a pH of 2 is?

A:

Q: pH is one of the most important controlling factors for treatment and chemical analysis of water and…

A: pH :-      pH is a measurement of the alkalinity or acidity of a substance. pH measure is the…

Q: 300 ml of 0.05 M ammonia solution, where the density of the solution is 0.88 g/ml. The pka of…

A: The negative logarithm to the base 10, of the ionization constant of an acid Ka is denoted as p Ka .…

Q: Determine the concentration of calcium hydroxide in solutions buffered at pH = 12.55.

A: Given, pH = 12.55 Concentration of calcium hydroxide, Ca(OH)2 = [Ca(OH)2] = ? The formula used here…

Q: What is the pH of a 0.028 M solution of pyridine? The pKa for the pyridinium ion is 5.20. a)7.00…

A: pH of solution is determined by taking negative logarithm of hydronium ion concentration.…

Q: a 1L, 0.1M, pH = 7.4 buffer solution. The weak acid is 0.5M, pKa = 8.6. The conjugate base is 0.1M.…

A:

Q: Identify the parent acid and base that would produce a NaH2PO4 salt solution in a neutralization…

A: Given that : We have to identify the parent acid and base that would produce a NaH2PO4 salt solution…

Q: The pKa of a particular weak acid is 4.85. What is the pH of the weak acid solution when exactly…

A:

Q: 25. Mik of nmagnesia, Mg(OH),, has a pH of 10.5. Calculate the hydronium jon concentration of the…

A: Given pH for milk of magnesia Mg(OH)2 =10.5 We know, pH=-log[H3O+] 10.5 = -log[H3O+] Taking antilog…

Q: Calculate the pH of a sample of 1.5 M CH3COOH.

A: Given :- molar concentration of acetic acid = 1.5 M  To calculate :- pH

Q: Write chemical reactions to show how each antacid ingredient neutralizes excess stomach acid:  a.)…

A: Antacids are the substances that neutralize the acidity of the stomach. They work differently from…

Q: What is the pH of a 0.050 M solution of formic acid?

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: Indicate the color of red cabbage juice when it is added into each of the following solutions: a)…

A: Red cabbage or red cabbage juice has a pigment named as anthocyanin which tends to change colour…

Q: Calculate the pH of a solution that is 1.8*10^-3 M morphine if the pKa of its conjugate acid is 8.21

A: We have to predict the pH of the morphine solution.

Q: At what pH is the concentration of a compound, with a pKa = 3.7, 10 times greater in its acidic form…

A: Given information: pKa = 3.7 [Acid] = 10[Base]

Q: Complete the equation to show how hydrofluoric acid, HF, acts as a Brønsted-Lowry acid in water.…

A: HF  + H2O       double arrow      H3O+     +     F-

Q: Write a net ionic equation to show that hydroxylamine, NH₂OH, behaves as a Bronsted-Lowry base in…

A: Bronsted-Lowry acid-base theory: The Bronsted-Lowry acid-base theory states that the acid is a…

Q: If 25.0 mL of water are added to this system, indicate whether the following statements (Note the…

A: If we add water then concentration of acid  and salt is changed due to volume increases.  a) True b)…

Q: What is the concentrations of OH−

A: Given :- pH = 3.75  To calculate :- [OH-]     pH = -log[H+]

Q: Find the pH and the pOH of the solutions 1. A 0.023 M solution of hydrochloric acid   2. A 6.6 x…

A:

Q: A 0.100 M solution of ethylamine (C2H5NH2) has a pH of 11.87. Calculate the K for ethylamine.   B.…

A: A) Given : Initial concentration of C2H5NH2 = 0.100 M And pH of solution = 11.87

Q: The pka of a particular weak acid is 4.85. What is the pH of the weak acid solution when exactly…

A:

Q: 14.28 A 1.0 M aqueous solution of ammonia has a pH of 11.63 at 25°C. Calculate the Kh for ammonia.

A: Given: pH of the solution = 11.63. The relationship between pH and pOH of the solution at 25oC is:…

Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".