1)how would the accuracy of your determined keq change if all your volume measurements were made with graduated cylinders rather than pipets ?
2) if all of the SCN^- was not converted completely to FeNCS^2+ when the calibration curve was prepared would this raise or lower the value of Keq? Explain.
Thank You So Much!!!!!
1) The accuracy of the determined Keq would be lower if all the volume measurements were made with graduated cylinders rather than pipets. This is because graduated cylinders are not as precise as pipets, and therefore the measurements would be less accurate.
2) If all of the SCN^- was not converted completely to FeNCS^2+ when the calibration curve was prepared, this would lower the value of Keq. This is because the calibration curve would not be as accurate, and therefore the Keq value would be lower than it should be.
1) The accuracy of the determined K_eq would likely decrease if all volume measurements were made with graduated cylinders instead of pipettes. This is because graduated cylinders typically have larger uncertainties in volume measurements compared to pipettes. Pipettes are designed to deliver precise volumes, with lower uncertainties. Inaccurate volume measurements can lead to incorrect mole ratios, thus affecting the calculated value of the equilibrium constant (K_eq).
To improve the accuracy, it is recommended to use pipettes for volume measurements. Pipettes are more precise and have calibrated markings, allowing for accurate and reproducible measurements.
2) If all of the SCN^- was not converted completely to FeNCS^2+ when the calibration curve was prepared, it would lower the value of K_eq. The equilibrium constant, K_eq, is a ratio of the concentrations of products to reactants at equilibrium. If not all of the SCN^- was converted, the concentration of FeNCS^2+ would be lower than expected, leading to a lower value of K_eq.
To ensure accurate determination of K_eq, it is important to make sure that the reaction has gone to completion and that all reactants have been converted to products before preparing the calibration curve. This can be achieved by waiting for the reaction to reach equilibrium or by using an excess of one of the reactants to drive the reaction forward.
1) The accuracy of the determined Keq would depend on the precision and accuracy of the volume measurements made with graduated cylinders rather than pipets. Graduated cylinders are generally less precise than pipets due to their larger graduations and potential for parallax errors. Therefore, if you switch from using pipets to graduated cylinders, there may be a decrease in the precision of the volume measurements. This decrease in precision could lead to a less accurate determination of Keq. Inaccurate volume measurements can result in incorrect calculation of the concentration of reactants and products, thus affecting the determination of Keq.
2) If all of the SCN^- was not converted completely to FeNCS^2+ when the calibration curve was prepared, it would lower the value of Keq. The equilibrium constant Keq is calculated based on the concentrations of reactants and products at equilibrium. If some of the SCN^- was not converted, it means that the concentration of SCN^- at equilibrium would be lower than expected, resulting in a lower Keq value. The reaction will not have fully reached equilibrium, leading to an incomplete conversion of reactants to products and therefore a lower Keq value.