Having the density of water and the temperature of water, you should be able to determine the volume of the flask very precisely. Empty the flask, dry it, and fill it with your unknown liquid. Stopper and dry the flask as you did when working with the water, and then weigh the stoppered flask full of the unknown liquid, making sure
-We measured in each chemical and added water besides, HCl we added NaOH. Next, we measured the water temperature to begin with then added the substance to it to determine the finally temperature. We minus the initial and finally to decide if the reaction is exothermic and endothermic. 5. Describe the anticipated temperature change of a system in which an exothermic process is taking place.
No matter what change of the pressure, the volume will change to have an end product of 7.336. 6. Explain how your results are affected using a real gas (N2). This gas did not behave in an ideal way and the end product is off by a minuscule amount. The equation P1V1=P2V2 still applies,
Then 5mL of HCl was added to copper to completely remove all traces of zinc. Once the bubbling had stopped, the rest of the liquid was decanted away from the copper. Then the copper recovery set up was put together using tubing, Buchner funnel, filter paper and suction flask. Then the filter paper was weighed before placing it in the funnel and wetted down. The aspirator was turned to medium high, and then the copper was poured onto wetted filter paper.
ECF potassium levels affect resting membrane potential. Hyperkalemia (excessive levels of potassium in the blood) and hypokalemia (abnormally low blood potassium levels) both affect the function of nerves and muscles. • Explain how hyperkalemia will initially affect the resting membrane potential and the generation of an action potential. The resting membrane potential is based on the polarization of the cell. If there are higher levels of potassium, then the resting membrane potential will be less than normal and an action potential will be not likely with the same amount stimulation.
Using this information, we can calculate the amount of the block that should be underwater using the following, mblackg=Fbouyancy=mdisplaced waterg therefore, ρblockVblock=ρwaterVdisplaced water →ρblockh=ρwaterx. Experimental Overview The purpose of this lab is to measure volumes and masses to compute density, and measure displaced volumes and buoyancy forces. First, we measured the radius of the
Once you have drained all the oil replace the drain plug back in the oil pan. Make sure you tighten down
The following equation represents this relationship where k denotes the spring constant or stiffness of the spring, F=-kx Since x symbolizes the displacement or change in the length of the spring the above equation can now be surmised in the following manner, F=mg=-k∆l This new form makes it evident that a linear proportion exists between the plot of F as function of changing in length, ∆, thus confirming the spring does in fact obey Hooke’s Law. This enabled the group to determine the spring constant k. B. Derivation of Equations Definitions To gain a better understanding of the terms used here
One serious blunder could have been not paying attention. Because we had to record the amount of time the Mg strip dissolved, we had to keep a close eye on the reaction. One thing that could have affected this was talking to others around you, or trying to multitask. Generally speaking, systematic and random errors did not have a great effect on my data and results. However, if the blunder were true, my data would have been completely wrong resulting in an incorrect graph and rate law for magnesium.
II. Procedure: Equipment needed is a large beaker, various weights, a track, two levers, a string, force sensor, scale, a car, a tuna can, a sphere, a block, and cylinders. In the first part of the lab, first we predict the theoretical buoyant force water acts on the sphere, the block, and two cylinders using the above equation FB=ρgV and the volume for various shapes is V(sphere)=4/3πR3, V(cylinder)=πR2h, V(block)=LWH. Second we measure the buoyant force for each of those shapes taking its weights in and out of water by the force sensor and the scale respectively. The difference is the buoyant force FB=Wout – Win.