skool gurl
New member
1. Write the Ka expressions for the dissociation reaction of the following weak acid HClO?
a) Ka = ([H+]^2[ClO-]^2)/[HClO])
b) Ka = ([H+][ClO-])/[HClO]^2)
c) Ka = ([H+][ClO-])/[HClO])
d) Ka = ([HClO]/[H+]^2[ClO-]^2)
e) Ka = ([HClO]/[H+][ClO-])
2. Identify each Bronsted base in the following equations. Note that the reaction is assumed to be reversible: HC2H2ClO2(aq) + H2O(l) <--> C2H2ClO2^ -(aq) + H3O^+(aq) ?
a) HC2H2ClO2 (aq) + H2O(l)
b) C2H2ClO2 - (aq) + H2O(l)
c) C2H2ClO2 - (aq) + H3O+ (aq)
d) HC2H2ClO (aq) only
e) HC2H2Cl2 (aq) + H30+ (aq)
3. Calculate the molar concentration of OH- in water solutions with the following H3O+ molar concentration 0.0035M?
a) 11.54M
b) 2.46M
c) 3.5x10^ - 17M
d) 3.5x10^11M
e) 2.9X10^ - 12M
4. The [H3O+] of a solution is 3.2x10^ -8M. The solution is?
a) acidic
b) basic
c) neutral
5. A solution with a [H3O+] OF 0.0001M has a pH of
a) 3
b) 4
c) 7
d) 11
6. A pH of 8 means a [H3O+] of?
a) 8M
b) 0.8M
c) 1X10^ -8M
d) 8X10^ -8M
e) 1X10^8M
7. Determine the number of moles of HBr that could be neutraized by the following 500. mL of 0.120M KOH ?
a) 0.240mol
b) 0.20mol
c) 0.060mol
d) 4.17mol
e) 0.120
8. For the reaction: H2(g) + I2(g) --> 2HI(g) ?
a) [HI]/([H2][I2])
b) ([H2][2])/[HI]^2
c) [2HI]/([H2] + [I2])
d) [HI]^2/([H2][I2])
Please show me how to work out the solutions???!!!
9. A balanced equation representing the ionization of barium sulfate in water is?
10. Ammonia is produces by the reaction of hydrogen and nitrogen: N2(g) + 3H2(g) --> 2NH3(g) How many moles of H2 are needed to react with 1.0 mole of N2?
11. How many atoms are in 5.9mol of H(g)?
12. If the pressure of 245mL of hydrogen iodide gas at 100 degree C decrease from 985 torr to 215 torr, what is the final volume? Assume temperature remains constant?
13. Calculate the heat needed at 0 degree C to make the following change of state. Indicate whether heat was absorbed or released: Calories to freeze 95g of water ( heat of fusion = 80 cal/g; heat of vaporization = 540 cal/g?
a) 1.6x10^4 cal released
b) 1.6x10^4 cal absorbed
c) 7.6x10^3 cal released
d) 7.6x10^3 cal absorbed
e) 2.4 cal released
14. Of the common nuclear radiation, which one has a charge of +1 and a negligible mass?
15. Write the equation for the positron emission process of the ^38 20Ca?
16. Citric acid is found in citrus fruits such as lemons, limes, oranges. The formula for citric acid is C2H4OH(COOH)3. What is the total number of atoms in citric acid?
Please show me how to work these equations out!!!!????
a) Ka = ([H+]^2[ClO-]^2)/[HClO])
b) Ka = ([H+][ClO-])/[HClO]^2)
c) Ka = ([H+][ClO-])/[HClO])
d) Ka = ([HClO]/[H+]^2[ClO-]^2)
e) Ka = ([HClO]/[H+][ClO-])
2. Identify each Bronsted base in the following equations. Note that the reaction is assumed to be reversible: HC2H2ClO2(aq) + H2O(l) <--> C2H2ClO2^ -(aq) + H3O^+(aq) ?
a) HC2H2ClO2 (aq) + H2O(l)
b) C2H2ClO2 - (aq) + H2O(l)
c) C2H2ClO2 - (aq) + H3O+ (aq)
d) HC2H2ClO (aq) only
e) HC2H2Cl2 (aq) + H30+ (aq)
3. Calculate the molar concentration of OH- in water solutions with the following H3O+ molar concentration 0.0035M?
a) 11.54M
b) 2.46M
c) 3.5x10^ - 17M
d) 3.5x10^11M
e) 2.9X10^ - 12M
4. The [H3O+] of a solution is 3.2x10^ -8M. The solution is?
a) acidic
b) basic
c) neutral
5. A solution with a [H3O+] OF 0.0001M has a pH of
a) 3
b) 4
c) 7
d) 11
6. A pH of 8 means a [H3O+] of?
a) 8M
b) 0.8M
c) 1X10^ -8M
d) 8X10^ -8M
e) 1X10^8M
7. Determine the number of moles of HBr that could be neutraized by the following 500. mL of 0.120M KOH ?
a) 0.240mol
b) 0.20mol
c) 0.060mol
d) 4.17mol
e) 0.120
8. For the reaction: H2(g) + I2(g) --> 2HI(g) ?
a) [HI]/([H2][I2])
b) ([H2][2])/[HI]^2
c) [2HI]/([H2] + [I2])
d) [HI]^2/([H2][I2])
Please show me how to work out the solutions???!!!
9. A balanced equation representing the ionization of barium sulfate in water is?
10. Ammonia is produces by the reaction of hydrogen and nitrogen: N2(g) + 3H2(g) --> 2NH3(g) How many moles of H2 are needed to react with 1.0 mole of N2?
11. How many atoms are in 5.9mol of H(g)?
12. If the pressure of 245mL of hydrogen iodide gas at 100 degree C decrease from 985 torr to 215 torr, what is the final volume? Assume temperature remains constant?
13. Calculate the heat needed at 0 degree C to make the following change of state. Indicate whether heat was absorbed or released: Calories to freeze 95g of water ( heat of fusion = 80 cal/g; heat of vaporization = 540 cal/g?
a) 1.6x10^4 cal released
b) 1.6x10^4 cal absorbed
c) 7.6x10^3 cal released
d) 7.6x10^3 cal absorbed
e) 2.4 cal released
14. Of the common nuclear radiation, which one has a charge of +1 and a negligible mass?
15. Write the equation for the positron emission process of the ^38 20Ca?
16. Citric acid is found in citrus fruits such as lemons, limes, oranges. The formula for citric acid is C2H4OH(COOH)3. What is the total number of atoms in citric acid?
Please show me how to work these equations out!!!!????