Basic Chemistry Questions covering all topics (help)

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thread starter garycheng17 Sep 07 2009 + PM | QUOTE | PERMALINK | REPORT

EDIT: Couple more, 2. How many covalent bonds in CH3ON? A double covalent bond would be considered 2 bonds. 3. Which of the following would NOT occur due to the addition of naOH to a beaker of pure water? A. More water (H2O) molecules would form B. More hydronium ions would form C. The hydrogen ion concentration would go down D. The pH would go up E. The solution would become basic The ones on the bottom have been solved! I know this is not really the time for posting a thread, but I am desperate after reviewing old Chem notes (this is a review homework): 1. What are the maximum number of covalent bonds an element with atomic number 16 can make with hydrogen? 2. If atom with an atomic number of 6 were allowed to react with hydrogen, the molecule formed would be (what would it look like drawn in a diagram?) 3. A given solution is found to contain 0.0001 mol of hydrogen ions (H+) per liter. Which of the following best describes this solution? A. acidic: H+ acceptor B. basic H+ acceptor C. acidic H+ donor D. basic H+ donor E. neutral 4. A given solution is found to contain 0.000001 mol of hydroxide ions (OH-) per liter. Which of the following best describes this solution? A. acidic: H+ acceptor B. basic H+ acceptor C. acidic H+ donor D. basic H+ donor E. neutral 5. What would be the pH of a solution with a hydroxide ion concentration [OH] of 10^-10 M? 6. What would be the pH of a solution with a hydrogen concentration [H+] of 10^-8? 7. Buffers are substances that help resist shifts in pH by A. releasing H+ in acid solutions B. releasing H+ in basic solutions C. releasing OH- in basic solutions D. combining with OH- in acidic solutions E. combining with H+ in basic solutions 8. True-false: hydrogen ion = proton 9. How many covalent bonds will the element Phosphorus (P) make? 10. How many covalent bonds in CH3ON? A double covalent bond would be considered 2 bonds. 11. Which of the following statements is FALSE? A. Sugar will dissolve in water B. The ionic compound CaCl2 will dissolve in water C. Sugar will dissociate in water D. The ionic compound CaCl2 will dissociate in water E. Water molecules have the ability to dissociate 12. True-false: the molecular mass of the products will be different from that of the reactants

3343400 09/07/09 + PM | QUOTE | PERMALINK | REPORT

wow thats some homework you got there.

DarkWater Sep 07 2009 + PM | QUOTE | PERMALINK | REPORT

1. 2 2. CH4 (methane) 3. C 4. EDIT: You wrote hydrogen but put the formula for hydroxide. Which is it? 5. 4 6. 8 7. B 8. Depends on the ion. Cation or anion? 9. 3 10. Impossible compound...Maybe the teacher made a mistake? 11. E 12. F I really, really like chemistry. :o

iCantRead 09/07/09 + PM | QUOTE | PERMALINK | REPORT

garycheng17 : I know this is not really the time for posting a thread, but I am desperate after reviewing old Chem notes (this is a review homework): 1. What are the maximum number of covalent bonds an element with atomic number 16 can make with hydrogen? 2. If atom with an atomic number of 6 were allowed to react with hydrogen, the molecule formed would be (what would it look like drawn in a diagram?) 3. A given solution is found to contain 0.0001 mol of hydrgen ions (H+) per liter. Which of the following best describes this solution? A. acidic: H+ acceptor B. basic H+ acceptor C. acidic H+ donor D. basic H+ donor E. neutral 4. A given solution is found to contain 0.000001 mol of hydrgen ions (OH-) per liter. Which of the following best describes this solution? A. acidic: H+ acceptor B. basic H+ acceptor C. acidic H+ donor D. basic H+ donor E. neutral 5. What would be the pH of a solution with a hydroxide ion concentration [OH] of 10^-10 M? 6. What would be the pH of a solution with a hydrogen concentration [H+] of 10^-8? 7. Buffers are substances that help resist shifts in pH by A. releasing H+ in acid solutions B. releasing H+ in basic solutions C. releasing OH- in basic solutions D. combining with OH- in acidic solutions E. combining with H+ in basic solutions 8. True-false: hydrogen ion = proton 9. How many covalent bonds will the element Phosphorus (P) make? 10. how many covalent bonds in CH3ON? 11. Which of the following statements is FALSE? A. Sugar will dissolve in water B. The ionic compound CaCl2 will dissolve in water C. Sugar will dissociate in water D. The ionic compound CaCl2 will dissociate in water E. Water molecules have the ability to dissociate 12. True-false: the molecular mass of the products will be different from that of the reactants 1. 6 (I think) 2. CH4 and the model would look like a cross. 3. C 4. C 5. 4 6. 8 I gotta go now but hope this helped

garycheng17 09/07/09 + PM | QUOTE | PERMALINK | REPORT

I didn't get a chance to read what you guys posted yet, but I just wanted to say this is only 1 double-sided page of my back to school summer assignments, lol. These are all the questions I don't feel I am 100% sure of my answers, but thanks for any contributions whether they were right or wrong, guys.

hardballer 09/07/09 + PM | QUOTE | PERMALINK | REPORT

You should do your own homework =S

danny3 09/07/09 + PM | QUOTE | PERMALINK | REPORT

YangGuang 09/07/09 + PM | QUOTE | PERMALINK | REPORT

#2 tetrahedral (like a pyramid with a 3-sided base) shape methane #3 and #4 -log(concentration) = pH since #4 is OH, you will have to figure out the H from that. 1e-14/1e-10 (total/the concentration of OH) = 1e-4 (the concentration of H) -log(1e-4) = 4 or just look at the exponent..

aznegglover 09/07/09 + PM | QUOTE | PERMALINK | REPORT

this is basilmarket, not basil-does-your-hw-for-you

garycheng17 09/07/09 + PM | QUOTE | PERMALINK | REPORT

DarkWater : 1. 2 2. CH4 (methane) 3. C 4. EDIT: You wrote hydrogen but put the formula for hydroxide. Which is it? 5. 4 6. 8 7. B 8. Depends on the ion. Cation or anion? 9. 3 10. Impossible compound...Maybe the teacher made a mistake? 11. E 12. F I really, really like chemistry. :o Sorry, I copy and pasted 3 and 4 but forgot to change the typo. It's hydroxide now.

aznegglover Sep 07 2009 + PM | QUOTE | PERMALINK | REPORT

sorry double-post

WetFish 09/07/09 + PM | QUOTE | PERMALINK | REPORT

garycheng17 : I know this is not really the time for posting a thread, but I am desperate after reviewing old Chem notes (this is a review homework): 1. What are the maximum number of covalent bonds an element with atomic number 16 can make with hydrogen? 2. 2. If atom with an atomic number of 6 were allowed to react with hydrogen, the molecule formed would be (what would it look like drawn in a diagram?) CH4. Tetrahedral. 3. A given solution is found to contain 0.0001 mol of hydrgen ions (H+) per liter. Which of the following best describes this solution? Basic (B) A. acidic: H+ acceptor B. basic H+ acceptor C. acidic H+ donor D. basic H+ donor E. neutral 4. A given solution is found to contain 0.000001 mol of hydrgen ions (OH-) per liter. Which of the following best describes this solution? Acidic (A) A. acidic: H+ acceptor B. basic H+ acceptor C. acidic H+ donor D. basic H+ donor E. neutral 5. What would be the pH of a solution with a hydroxide ion concentration [OH] of 10^-10 M? 4. OH = 10, 14-10 = 4. 6. What would be the pH of a solution with a hydrogen concentration [H+] of 10^-8? 8. 7. Buffers are substances that help resist shifts in pH by D and E are both correct. A. releasing H+ in acid solutions B. releasing H+ in basic solutions C. releasing OH- in basic solutions D. combining with OH- in acidic solutions E. combining with H+ in basic solutions 8. True-false: hydrogen ion = proton True 9. How many covalent bonds will the element Phosphorus (P) make? 3. 10. how many covalent bonds in CH3ON? H H C N O Count your self H 11. Which of the following statements is FALSE? A. Sugar will dissolve in water B. The ionic compound CaCl2 will dissolve in water C. Sugar will dissociate in water D. The ionic compound CaCl2 will dissociate in water E. Water molecules have the ability to dissociate E is false 12. True-false: the molecular mass of the products will be different from that of the reactants True, but the total mass of the whole reaction will not be changed. Hope that helped.

garycheng17 09/07/09 + PM | QUOTE | PERMALINK | REPORT

Wow, I didn't think I would get so many answers, I actually have a few more questions I am going to add soon =/

Oyster Sep 07 2009 + PM | QUOTE | PERMALINK | REPORT

8. Hydrogen ions are considered to be protons in solutions. 10. Are you sure it says CH3ON? 11. C [ sugar does not dissociate in water ] 12. False ... Must obey the law of conservation of matter, mass of reactants must equal mass of products The rest of the answers seem right.