# Search results

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

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...
4. ### 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...
5. ### 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...
6. ### Relationships between first and second derivatives

moved... moved to the calculus forum
7. ### 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...
8. ### 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...
9. ### 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...
10. ### Describing derivatives in practical terms

Homework Statement Suppose C(r) is the total cost of paying off a car loan borrowed at an annual interest rate of r%. What are the units of C '(r)? What are the units of C'(r)? What is its sign? Homework Equations C'(r)=dC/dr The Attempt at a Solution So, I figured: C'(r) =...
11. ### Find a value of constant k so a limit to infinity exists

Find a value of constant "k" so a limit to infinity exists Homework Statement Find a value of the constant k such that the limit exists. Homework Equations lim x to infinity of x^3-6/x^k+3 The Attempt at a Solution I started by setting the equation equal to infinity and attempted to...