{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

chm 2045 quiz 2 - CHM 2045 Quiz#2 Name Section Question 1...

Info icon This preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
CHM 2045 Quiz #2 09/25/2007 Name: Section: Question # 1 Here is the reaction of calcium carbonate and hydrochloric acid: CaCO 3 (s) + 2HCl(aq) CO 2 (g) + CaCl 2 (aq) + H 2 O(l) (a) What type of reaction is this? (1 point) (b) What mass of CaCO 3 will completely react with 200mL of HCl(aq) with a pH of 1.30? (3 points) Gas-forming reaction Mass of CaCO 3 = 0.200 L • 10 -1.30 • 0.5 • 100.08 g/mol = 0.50 g Question # 2 Please write down the (1) reducing agent; (2) oxidizing agent; (3) net ionic equation of the following overall equations (6 points) (a) Cu (s) + 4HNO 3 (aq) Cu(NO 3 ) 2 (aq) + 2NO 2 (g) + 2H 2 O (l) Reducing agent: Cu (s); Oxidizing agent: HNO 3 (aq) Net ionic equation: Cu (s) + 2NO 3 2- (aq) + 4H + (aq) Cu 2+ (aq) + 2NO 2 (g) + 2H 2 O (l) (b) 2NaI (aq) + 2H 2 SO 4 (aq) + MnO 2 (s) Na 2 SO 4 (aq) + MnSO 4 (aq) + I 2 (g) + 2H 2 O (l) Reducing agent: NaI (aq); Oxidizing agent: MnO 2 (s) Net ionic equation: I - (aq) + 4H + (aq) + MnO 2 (s) Mn 2+ (aq) + I 2 (g) + 2H 2 O (l) Question # 3 Four 40-g iron cubes at 306.2 ° C are dropped into 1L of pure water to make them cool. The pure water was initially at 10.0 ° C; when thermal equilibrium was reached, the final temperature was 15.0 ° C. Please calculate the specific heat capacity of iron. (Assume the
Image of page 1
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern