Answered: For numbers 1 to 3, determine if the…

For numbers 1 to 3, determine if the given condition is (A) acidic, (B) basic, (C) neutral. or (D) cannot be determined. 1. pH = pOH 2. [H*] = 1.28 x 106 3. pOH = 4.0

Chemistry & Chemical Reactivity

9th Edition

ISBN:9781133949640

Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Chapter4: Stoichiometry: Quantitative Information About Chemical Reactions

Section: Chapter Questions

Problem 111GQ: One half liter (500. mL) of 2.50 M HCl is mixed with 250. mL of 3.75 M HCl. Assuming the total...

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One half liter (500. mL) of 2.50 M HCl is mixed with 250. mL of 3.75 M HCl. Assuming the total solution volume after mixing is 750. mL, what is the concentration of hydrochloric acid in the resulting solution? What is its pH?
In chemistry, the pH scale measures the acidity of a solution. Solutions with pH less than 7 are considered acidic, while solutions with pH greater than 7 are considered alkaline. A pH of 7 is considered neutral. The formula of pH is pH = -logx, where x represents the concentration of hydrogen ions in mol/L. Below is a diagram that conveys the pH of a few common foods and chemicals: ACIDIC NEUTRAL BASIC OR ALKALINE 1 2 3 4. 6 7 9 10 11 12 13 14 Battery Acid Stomach Acid - 1.0 Lime Juice - 1.8-2.0 Vinegar- 2.0-3.4 Lemon Juice – 2.2-2.4 Coca-Cola - 2.5 Cider – 2.9-3.3 Strawberries - 3.0-3.5 Yeasts - 3.0-3.5 Jams/Jellies - 3.1-3.5 Apples- 3.3-4.0 Honey - 3.9 Tomatoes – 4.2-4.1 Sugar – 5.0-6.0 Beef - 5.1-6.2 Pork - 5.3-6.9 Onions - 5.3-5.8 Lettuce - 5.8-6.0 Rice - 6.0-6.7 Butter - 6.1-6.4 8g Yolk - 6.4 Pure Water - 7.0 Milk – 6.3-8.5 Crackers - 7.0-8.5 Egg White - 7.0-9.0 Baking Soda - 9.0 Antacids Ammonia Calcium Hydroxide Lye Potassium Hydroxide
Give the answers that should be filled in the blanks below: Acetic acid solution: pH = 5.80; (a) [H*] = Ammonia solution: [H] = 5.90 x 10-9 M; (c) pH = M; (b) [OH-] = ; (d) pOH = M.
5) Scientists use the pH scale to represent the level of acidity or alkalinity of a liquid. This is based on the molar concentration of hydronium ions, [H+]. Since the valu es of [H+] vary over a large range, 1 × 100 mole per liter to 1 x 10-14 mole per liter (mol/L), a logarith mic scale is used to compute the pH. The formula pH = -log[H+] represents the pH of a liquid as a function of its concentration of hydronium ions, [ H+]. The pH scale ranges from 0 to 14. Pure water is taken as neutral having a pH of 7. A pH less than 7 is acidic. A pH greater than 7 is alkaline (or basic). Two acids have [H+] valu es of 3.2 x 10-3 mol/L and 2.4 x 10-6 mol/L respectively. Find the pH for each acid. Which substance is more acidic? Round pH values to 1 decimal place.
The pH reading of a glass of liquid is given. Find the hydrogen ion concentration of the liquid. (Give your answers in scientific notation, correct to one decimal place.) (a) Beer: pH = 5.3 [H+] = х 10 M (b) Water: pH = 7.2 [H*] = x 10 M
Scientists use the pH scale to represent the level of acidity or alkalinity of a liquid. This is based on the molar concentration of hydrogen ions, [H+]. Since the values of [H+] vary over a large range, 1 x 100 mole per liter to 1 × 10-14 mole per liter (mol/L), a logarithmic scale is used to compute pH. The formula pH = -log[H*] represents the pH of a liquid as a function of its concentration of hydrogen ions, [H+]. The pH scale ranges from 0 to 14. Pure water is taken as neutral having a pH of 7. A pH less than 7 is acidic. A pH greater than 7 is alkaline (or basic). For Exercise, use the formula for pH. Round pH values to 1 decimal place. Lemon juice Wine Ammonia Bleach 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 pH 100 10-2 10-4 10-7 10-10 10-12 10-14 [H+] Water Acidic Alkaline (neutral) Vinegar and lemon juice are both acids. Their [H+] values are 5.0 x 10-3 mol/L and 1 x 10-2 mol/L, respectively. a. Find the pH for vinegar. b. Find the pH for lemon juice. c. Which substance is more…
Scientists use the pH scale to represent the level of acidity or alkalinity of a liquid. This is based on the molar concentration of hydrogen ions, [H+]. Since the values of [H+] vary over a large range, 1 × 100 mole per liter to 1 x 10-14 mole per liter (mol/L), a logarithmic scale is used to compute pH. The formula pH = -log[H*] represents the pH of a liquid as a function of its concentration of hydrogen ions, [H+]. The pH scale ranges from 0 to 14. Pure water is taken as neutral having a pH of 7. A pH less than 7 is acidic. A pH greater than 7 is alkaline (or basic). For Exercise, use the formula for pH. Round pH values to 1 decimal place. Lemon juice Wine Ammonia Bleach 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 pH 100 10-2 10-4 10-7 10-10 10-12 10-14 [H+] Water Acidic Alkaline (neutral) Bleach and milk of magnesia are both bases. Their [H+] values are 2.0 x 10-13 mol/L and 4.1 x 10-10 mol/L, respectively. a. Find the pH for bleach. b. Find the pH for milk of magnesia. c. Which substance…
6. (i) Define pH in words. The strong acid HCl has a pH value of 1, use the following equation for a strong acid: aq HC1 aq à pH = -logo [H*] 10 Ht pH = aq + Cl and convert the following expression to deduce the hydrogen ion concentration: aq (ii) Use the above expression to deduce the pH of HCl (aq) given the concentration of the acid to be 4.5 mol/dm³
Complete the balanced chemical reaction for the following weak base with a strong acid. In this case, write the resulting acid and base as its own species in the reaction. 1 U + Reset 2 U 2 CH3NH₂(aq) + HCIO3(aq) 3 ← ( ) 4 5 co OH- CI 6 04 05 ☐6 ñ (s) 2+ 7 8 9 N 17 H3O+ 3+ 14+ • x H₂O 口口。 (1) (g) (aq) H₂O H Delete
2. Dilute sulphuric acid is a strong acid. (a) What is meant by a “strong" acid? (b) A student titrates 25.0 cm of dilute sulphuric acid with a 0.105 M NaOH(aq). The table below shows the results Trial 1 Trail 2 Trial 3 Trial 4 Trial 5 Volume of NaOH(aq) used / cm 23.50 21.10 22.10 22.15 22.15 (i) Calculate a reasonable average for the volume of NaOH(aq) used. The equation for the reaction is: H,SO4(aq) + 2 NaOH(aq) →Na,SO.(aq) + H2O(1) (ii) Calculate the concentration of the sulphuric acid. (iii) Which of the following apparatus is used to measure the volume of sulphuric acid in this experiment? measuring cylinder, pipette, burette, volumetric flask, beaker Answer:
According to the reaction below, NHs is + OH-, 3(g) (aq) O an acid. O a base. O both an acid and a base. neutral.
Calculate the hydronium ion concentration for 0.00073 M Mg(OH)2. Enter your answer in scientific notation with two significant figures, For example 6.4782 x 10would be entered as 6.5e-7 (no spaces).