Recent content by ada15

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    How to determine if the mixing of two solution would result in buffer solution?

    Hey there, thankyou for the links , but do you know how to find the answers without using chemical calculator ... I've an exam tomorrow.
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    How to determine if the mixing of two solution would result in buffer solution?

    Homework Statement Which of the following mixtures would result in buffered solutions whn 1.0 L of each of the two solutions are mixed? (i) 0.10 M sodium chloride and 0.10 M sodium nitrite (ii) 0.10 M sodium chloride and 0.10 M ammonium chloride (iii) 0.10 M hydrochloric acid and 0.10 M...
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    Calculate pH of 23.0 mL of 6.29 M HCl Added to 160.0 mL Distilled Water

    Can you please help me with 1 more question ... please ! Question: What is the pH of a 0.620 M solution of CH_3NH_3+Br- if the p[SIZE="3"]Kb of CH_3NH_2 is 10.62 ? Relevant Equation: pKa = - log Ka pKb = - log Kb Attempt: I tried finding Kb ... but I think I used the...
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    Calculate pH of 23.0 mL of 6.29 M HCl Added to 160.0 mL Distilled Water

    thanks a lot !
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    Calculate pH of 23.0 mL of 6.29 M HCl Added to 160.0 mL Distilled Water

    Homework Statement Calculate the pH of the solution a) 23.0 ml of 6.29 M HCl is added to 160.0 ml of distilled water Homework Equations pH = -log [H] [SIZE="4"]Kw= [H][OH] [SIZE="4"]Kw = 1 x 10^-14 The Attempt at a Solution [SIZE="4"]For part a) I found the no.of moles...
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    What Is the Equilibrium Concentration of CO in the Reaction at 400K?

    Homework Statement CO(g) + NH_3(g) ...> HCONH_2(g) euilibrium constant is: K = 0.207 at 400 K If a reaction is filled with intial concentrations 2.20 M of CO and 2.60 M of NH_3 and the reactanats are allowed to raect at 400K/ what will be the concentrations of CO at equilibrium ...
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    Exploring the Anomalous i Value in Freezing Point Depression of KCl Solutions

    Hi Guys, I have a question and its regarding to the freezing point depression lab ... I did an experiment where I had to find an "i" value for KCl. I'm getting 2.4 for "i" ... but the theoratical value is 2. I was just wondering why expriment value os higher than the theortical value ? what...
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    How much energy is dissipated by the 25 ohm resistor?

    Hi, Do you calculate the energy by this formula; Q=CV Q= (0.25 * 10^-6) ( 50) Q = 0.0000125 C
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    Integration Methods: How Can You Determine the Best Approach?

    thanks for the help.
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    Integration Methods: How Can You Determine the Best Approach?

    now how do i know which method to use in these integrals ? :confused:
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    Integration Methods: How Can You Determine the Best Approach?

    int x cos 5x dx int (lnx)^2 dx int arctan 4t dt int dx/5-3x
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    Integration Methods: How Can You Determine the Best Approach?

    http://http://dl.uncw.edu/digilib/mathematics/calculus/integration/freeze/images/FundTheorems3.gif Lets say this question is given : Now how do you know which method to use ? Please can someone give me example and explain ... I have an exam tomorrow ... I am really really confused...
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    Integration Methods: How Can You Determine the Best Approach?

    confused: http://www.math.ucdavis.edu/~kouba/CalcTwoDIRECTORY/usubdirectory/USubstitution.html
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    Integration Methods: How Can You Determine the Best Approach?

    Hi, There are different ways by which we can integrate function : 1. Substitution 2. Integration by parts 3. Trigonomtery 4. Partial functions But how one know that which method to use ? Please can anyone explain how to figure out the way of doing integration? I'll be really...
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    Projectile Motion of a golf ball

    i know that delta t is common in projectile motion but there is only delta d (x-component ) given and an angle, nothing else.. there is no velocity so i could use it with angle and calculate the sine law and cosin law..and not even time .. any answer