Homework Answers
10. Donor
A base such as OH- are electron pair donors and acids.are acceptors.
11. Increases
Higher the electronegativity of a, easier it is to give H+ ions in aqueous solution. This implies the acid is strong.
12. Increases
As A is larger, it is easier to break the H-A bond to give H+ ions.
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10. For Lewis acids and bases, the base is defined as an electron...
0 TOXO 9. When a weak acid and a strong base are mixed, the resulting pH...
0 TOXO 9. When a weak acid and a strong base are mixed, the resulting pH will be <7/7/>7 (circle the correct answer). 10. For Lewis acids and bases, the base is defined as an electron pair donor / acceptor (circle the correct answer). 11. When comparing anions from the same period, higher electronegativity of A in the H-A bond increases / decreases (circle the correct answer) acid strength. 12. When comparing anions from the same group, larger size of...
Which of the following is a true statement about the Lewis definition of acids and bases? Select the correct answer below: The Lewis definition of acids and bases is based on donating or accepting an electron pair.
Which of the following is a true statement about the Lewis definition of acids and bases? Select the correct answer below: The Lewis definition of acids and bases is based on donating or accepting an electron pair. O The Lewis definition of acids and bases is based on the production of HO or OH ions in water solutions O The Lewis definition of acids and bases is based on donating or accepting a proton. O none of the above MORE...
some acids + bases questions. please answer all parts! Thank you so much! 3a. Cyanic acid,...
some acids + bases questions. please answer all parts! Thank you so much! 3a. Cyanic acid, HCNO, is a weak monoprotic acid with Ka = 2.0 × 10−4.Calculate the pH of a 0.820 M solution of this acid. Report your answer to TWO places past the decimal. 3b. Hypobromous acid, HBrO, is a weak monoprotic acid with Ka = 2.8 × 10−9.Calculate the pH of a 0.312 M solution of this acid. Report your answer to TWO places past the...
3. i). Write the formula of four strong acids and four strong bases. ii). List four...
3. i). Write the formula of four strong acids and four strong bases. ii). List four factors that affect the strength of an acid. iii). Predict the relative strength of the following compounds: H2O, H2S and H2Se. iv). Which of the following is the stronger acids: CHCICOOH or CHCI-COOH? Explain. v). Al 3* is not a Bronsted acid, Al(H2O)" is. Explain. vi). All Bronsted acids are Lewis acids, but the reverse is not true. Give two examples of two Lewis...
Answer the question below: 1: i) Identify the Lewis acids and bases in each of the...
Answer the question below: 1: i) Identify the Lewis acids and bases in each of the following reactions: a. NH3 + BF3 → F3B NH3 b. H2O + SO3 → H2SO4 c. NH4+ + OH- → NH3 + H2O d. CO2 + H2O → H2CO3 e. OH−+H+→H2O ii) Identify the following compounds as either a Lewis acid or Lewis base and as either Soft or Hard: a. Cr3+ b. SO3 c. SCN− d. I
Worksheet Week 10 Name: 1. During strenuous exercise lactic acid builds up in a muscle tissues....
Worksheet Week 10 Name: 1. During strenuous exercise lactic acid builds up in a muscle tissues. In a 1.00 Maqueous solution 2.94% of lactic acid is ionized. What is the value of its ka? 2. At equilibrium of (H') in a 0.250 M solution of an unknown acid is 4.07 x 10 M. Determine the degree of ionization and the Ka of this acid. 3. The venom of biting ants contains formic acid, HCOOH, Ka = 1.8 x 10-Mat 25°C....
Lab 5 Buffers 1. Dissolved ions in salt solutions can act as acids or bases and...
Lab 5 Buffers 1. Dissolved ions in salt solutions can act as acids or bases and react with water to produce hydronium ions or hydroxide ions that contribute to the pH of the salt solution. Since strong acids and strong bases completely ionize in solution, the reverse reaction essentially does not occur, meaning that the resulting conjugate base of a strong acid or conjugate acid of a strong base do NOT act as acids or bases. Ions that are conjugate...
1) An Arrhenius acid is defined as a substance which: A) increases [H+] when placed in...
1) An Arrhenius acid is defined as a substance which: A) increases [H+] when placed in water C) decreases [H+] when placed in water B) acts as proton acceptor in any system D) acts as proton donor in any system 2) Which of the following is a correct balanced equation for the neutralization reaction that occurs between Al(OH)3 and HCl(aq)? A) Al(OH)3 + HCl(aq) → AICI3 + H20 B) Al(OH)3 + 3 HCI (aq) → AICI3 + H+ + OH-...
O ACIDS AND BASES Calculating the pH of a weak acid Utrated with a strong base...
O ACIDS AND BASES Calculating the pH of a weak acid Utrated with a strong base An analytical Chemist is titrating 60.1 ml of a 0.5200 M solution of butanolc acid (HC,H,CO) with a 1.000 M solution of KOH. The pk of butanoic acid is 4.82. Calculate the pH of the acid solution after the chemist has added 18.7 ml of the KOH solution to it. Note for advanced students you may assume the final volume equals the initial volume...
1. Which of the followi ch of the following reactions is not readily explained by the Arrhenius concept of acids a...
1. Which of the followi ch of the following reactions is not readily explained by the Arrhenius concept of acids and bases? a. A. HCl(aq) + NaOH(aq) - NaCl(aq) + H20() b. H30(aq) + OH-(aq) + 2H20(1) c. HCI(g) + NH3(g) - NH4Cl(s) d. HC2H302(aq) + H2O(l) H30*(aq) + C2H302-(ag) e. H30 (aq) + OH-(aq) + 2H2O(aq) 2. Classify each of the following species as Brønsted acid or base or both: a) H20, b) OH", c) H30, d) NH3, e)...
0 TOXO 9. When a weak acid and a strong base are mixed, the resulting pH will be <7/7/>7 (circle the correct answer). 10. For Lewis acids and bases, the base is defined as an electron pair donor / acceptor (circle the correct answer). 11. When comparing anions from the same period, higher electronegativity of A in the H-A bond increases / decreases (circle the correct answer) acid strength. 12. When comparing anions from the same group, larger size of...
Which of the following is a true statement about the Lewis definition of acids and bases? Select the correct answer below: The Lewis definition of acids and bases is based on donating or accepting an electron pair. O The Lewis definition of acids and bases is based on the production of HO or OH ions in water solutions O The Lewis definition of acids and bases is based on donating or accepting a proton. O none of the above MORE...
3. i). Write the formula of four strong acids and four strong bases. ii). List four factors that affect the strength of an acid. iii). Predict the relative strength of the following compounds: H2O, H2S and H2Se. iv). Which of the following is the stronger acids: CHCICOOH or CHCI-COOH? Explain. v). Al 3* is not a Bronsted acid, Al(H2O)" is. Explain. vi). All Bronsted acids are Lewis acids, but the reverse is not true. Give two examples of two Lewis...
Worksheet Week 10 Name: 1. During strenuous exercise lactic acid builds up in a muscle tissues. In a 1.00 Maqueous solution 2.94% of lactic acid is ionized. What is the value of its ka? 2. At equilibrium of (H') in a 0.250 M solution of an unknown acid is 4.07 x 10 M. Determine the degree of ionization and the Ka of this acid. 3. The venom of biting ants contains formic acid, HCOOH, Ka = 1.8 x 10-Mat 25°C....
1) An Arrhenius acid is defined as a substance which: A) increases [H+] when placed in water C) decreases [H+] when placed in water B) acts as proton acceptor in any system D) acts as proton donor in any system 2) Which of the following is a correct balanced equation for the neutralization reaction that occurs between Al(OH)3 and HCl(aq)? A) Al(OH)3 + HCl(aq) → AICI3 + H20 B) Al(OH)3 + 3 HCI (aq) → AICI3 + H+ + OH-...
O ACIDS AND BASES Calculating the pH of a weak acid Utrated with a strong base An analytical Chemist is titrating 60.1 ml of a 0.5200 M solution of butanolc acid (HC,H,CO) with a 1.000 M solution of KOH. The pk of butanoic acid is 4.82. Calculate the pH of the acid solution after the chemist has added 18.7 ml of the KOH solution to it. Note for advanced students you may assume the final volume equals the initial volume...
1. Which of the followi ch of the following reactions is not readily explained by the Arrhenius concept of acids and bases? a. A. HCl(aq) + NaOH(aq) - NaCl(aq) + H20() b. H30(aq) + OH-(aq) + 2H20(1) c. HCI(g) + NH3(g) - NH4Cl(s) d. HC2H302(aq) + H2O(l) H30*(aq) + C2H302-(ag) e. H30 (aq) + OH-(aq) + 2H2O(aq) 2. Classify each of the following species as Brønsted acid or base or both: a) H20, b) OH", c) H30, d) NH3, e)...
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