# Recent content by madgab89

1. ### Titration from basic end point to acid endpoint

Homework Statement If you started at the basic end-point and titrated acetate solution to the acid end point, how much acid would be required? Our acetate solution was: 1 mL of 0.1 M acetic acid 1 mL of 0.1 M acetate 8 mL of water total volume: 10 mL Titration with 0.1 M HCl...
2. ### Chemistry: Comparing the Rf values of carotene and lycopene?

Comparing the Rf values of carotene and lycopene? Why does carotene have a higher Rf value than lycopene in TLC chromatography with a silica plate and a solvent of (3:10) dicholormethane:hexane? I know it's because carotene is less polar making it more soluble in the TLC solvent and...
3. ### Calorimetry & Enthalpy

Wait...if I look at the equation delta H=-CdeltaT In order for delta H to be positive wouldn't temperature change have to be negative?
4. ### Calorimetry & Enthalpy

Homework Statement For the reaction 2H2O(l) -> 2H2(g)+O2(g) delta H = +571.5 kJ If the reaction is carried out in an insulated chamber what effect would the reaction have on the temperature in the chamber? Why? The attempt at a solution I can't seem to get my head around this one. I...
5. ### Surface area of a solid of revolution

Yeah, I did that: I got pi as the volume of the solid and undefined (infinity) for the surface area. However its the theoretical part that i'm unsure about, where its asking if there's something wrong with the method...
6. ### Surface area of a solid of revolution

Homework Statement Consider now a shape that is obtained by revolving the “inﬁnitely long” function f (x) = 1/x , 1 ≤ x < ∞ around the x-axis. Find both the surface area of the resulting object, and the enclosed volume of it, i.e. the volume of the solid obtained from revolving the...
7. ### Relationships between first and second derivatives

sorry, don't know how i could have missed that h'(-1)=0 h(-1)=2
8. ### Relationships between first and second derivatives

Homework Statement Figure 4.46 shows the second derivative of h(x) for -2 \leq x \leq 1 a) Explain why h'(x) is never negative on this interval. b) Explain why h(x) has a global maximum at x=1 c) Sketch a possible graph of h(x) for this interval. I realize this is probably a fairly...
9. ### Relationships between first and second derivatives

moved... moved to the calculus forum
10. ### Points where tangent line touches 2 circles

Homework Statement On the circles y^2+x^2=1 and y^2+(x-3)^2=4 There is a line with positive slope that is tangent to both circles. Determine the points at which this tangent touches each circle. Homework Equations the derivative of the first circle i found: y'=-x/y the derivative of...
11. ### Finding unknown quadratic equations

Which variable would be the easiest to start solving for?
12. ### Finding unknown quadratic equations

Oh my goodness! If I could hug you over the internet I would :P Thank you so much! I can't believe I didn't realize how simply this could be broken down...i think I was just overthinking it.
13. ### Finding unknown quadratic equations

Yeah that's pretty much what I figured but I don't know what I'm supposed to do with all these unknowns... I really just don't know where to start.
14. ### Finding unknown quadratic equations

Homework Statement In the attached diagram, the displacement of a follower (y) changes as the angle of the cam changes (\vartheta). The follwer has a smooth velocity over the entire path. Therefore, the velocity must match on both sides of the four points noted on the graph. If we assume...
15. ### Chem: Soluble with Insoluble: Will Reaction occur?

Homework Statement Write the balanced net ionic equations for the reactions, if any that occur between: NiS(s) & HCl(aq) My attempt: NiS(s) + 2HCl(aq) -> NiCl2(aq) + H2S(s) NiS(s) + 2H + 2CL -> Ni(aq) + 2CL + H2S(s) NiS(s) + 2H(aq) -> Ni(aq) + H2S(s) My real question is...