AP化学春假冲刺小班

一年一度的AP化学考试将于五月初举行，针对今年的新的考试大纲和新的考题动向，我计划在春假期间开设两个冲刺小班，每个班为期一周
3月17日－3月21日， 每天上午10-12点
  3月24日－3月28日， 每天上午10-12点
请致电张老师604-808-6827查询详情。

Spring Break AP Chemistry Crash Classes

I will be offering two sessions of AP Chemistry Crash Classes in the coming spring break. I will be summarizing the key knowledge points for 5 big ideas as outlined in the most recent curriculum framework. Strategies in how to score high in the May exam will also be discussed.  Details as follow:
Time:　 10am -12pm , Mar. 17-Mar. 21, 2014
                10am-12pm,  Mar. 24-Mar. 28, 2014

Please call me at 604-808-6827 to reserve your spot. 
 You are always welcome to visit my website at www.vancouverchemistrytutor.com

张老师化学家教

Experienced Ph. D. in chemistry offering tutoring service for AP Chemistry, IB Chemistry, SAT II Chemistry, Chemistry 11 and Chemistry 12.  Personalized tutoring tailored to individual needs. Guaranteed improvement and success. 

I can tutor with both English and Chinese.

For one on one tutoring needs, please call 604-808-6827.

南开大学化学博士，UBC化学系博士后多年经验辅导AP化学，IB化学， SATII化学，十一年级和十二年级化学， 因材施教，帮你理解重点，抓住要点，取得满意考试成绩。可用中英文双语沟通。请电604-808-6827与张老师联系。

UBC Chemistry Tutor

 Experienced Ph. D. in chemistry offering tutoring service for CHEM 111, 113, 121, 123, 205 and 233.  Personalized tutoring tailored to individual needs. Guaranteed improvement and success.  I can teach with both English and Chinese.

For your tutoring needs, please call Dr. Zhang  at 604-808-6827.

南开大学化学博士，UBC化学系博士后多年经验辅导CHEM 111, 113, 121, 123, 205, 233. 因材施教，帮你理解重点，抓住要点，取得满意考试成绩。可用中英文双语沟通。 如果您有辅导需求，请随时与我联系 604-808-6827。

Langara Chemistry Tutor

 Experienced Ph. D. in chemistry offering tutoring service for CHEM 1114, 1118, 1120 and 1220. Personalized tutoring tailored to individual needs. Guaranteed improvement and success.  I can teach with both English and Chinese. For your tutoring needs, please call Dr. Zhang  at 604-808-6827.

南开大学化学博士，UBC化学系博士后多年经验辅导CHEM 1114, 1118, 1120, 1220 . 因材施教，帮你理解重点，抓住要点，取得满意考试成绩。可用中英文双语沟通。

如果您有辅导需求，请随时与我联系 604-808-6827。

Vancouver Chemistry Tutor 张老师化学家教

南开大学化学博士，UBC化学系博士后多年经验辅导AP化学，IB化学， SATII化学，十一年级和十二年级化学， 因材施教，帮你理解重点，抓住要点，取得满意考试成绩。可用中英文双语沟通。

 如果您有一对一辅导需求，请随时与我联系 604-808-6827。

AP Chemistry Question of the Day --49

Welcome back to my blog. Here comes the answer to question 48 I posted earlier. The correct answer is C. 

Inner electrons shield outer electrons more efficiently. As a result, the lower the principle quantum number, the closer the electron is to the nucleus,  the less screening the electron feels and the higher the effective nuclear charge. Among the four choices, C is correct. 1p orbital does not exist. comparing 2s and 2p, 2s has lower energy than 2p.


Following is Question 49 of the series. 

49. What is the solubility of lead (II) bromide at 298K if Ksp of lead (II) bromide is 6.6x10-6?

I will post the answer and explanation tomorrow. 

Thank you very much for reading my post, I am available to discuss any topics in AP chemistry. Please give me a call at 604-808-6827 or email me at vancouverchemistrytutor@gmail.com. My website is located at www.vancouverchemistrytutor.com.

Regards!