Table Nr 1. Color changes in IKI test for presence of starch and for presence of sugar in Benedict’s test |Part 1 |Original content |Original color |Final color |Color after Benedict’s test | |Sausage casing |glucose and starch |clear |clear | | |Beaker |distiled water |transparent |transparent
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experiment we explore the infestation of ECB (European Corn Borer) on different types of corn and how it effects the corn crop yield. The corn is grown in a controlled environment with the only changing variables being the type of corn and the concentrations of the infestation of the ECB. Varying levels of infestation are tested on a corn crop throughout a 140 day growing season‚ at the end of the season the crops are then measured for yield. Yield is determined by the number of ears per stalk and
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you will investigate the effect of solute concentration on water potential as it relates to living plant tissues. OBJECTIVES Before you begin this lab you should understand: - the mechanisms of diffusion and osmosis and their importance to cells - the concept of water potential - the relationship between solute concentration‚ pressure potential and the water potential of a solution - the concept of molarity and its relationship to osmotic concentration **also read the section on water potential
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Repeat steps 1 – 6 to make 20 mL of a 2 M solution of magnesium sulfate (F.W. 246.48) in a small flask or beaker. PART B: MAKING PARALLEL DILUTIONS A dilution consists of adding addition solvent (usually water) to a solution to reduce its concentration. Dilution Terminology a) One part food coloring combined with 9 parts water means the food coloring is 1 part in 10 mL total volume or 1/10 food coloring. The denominator in an expression with a slash (/) is the total volume of the solution
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are to plan an experiment to investigate how the boiling point of an aqueous solution of potassium chloride depends on the concentration of the solution. (a) (i) By considering how the vapour pressure changes as the concentration of the aqueous potassium chloride increases‚ predict and explain how the boiling point of the solution will be affected by the concentration of the solution. Predict how the boiling point will change
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The definition of a solute is the reactant that’s being dissolved. The only difference from a solute and a solvent is that the solvent is the one that’s doing the dissolving. Molecules randomly flow in all directions until there is an equal concentration throughout the solution. The dissolving process can vary depending on certain factors. Temperature‚ pressure‚ and surface area all affect the dissolving process. Increasing the pressure causes the solute to be increased in the solvent
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manipulating the concentration and weight percent of the active metal. 36 5.2 Conclusion In this research‚ the objective are to determine the effect of concentration of KOH to yield of FAME and also to determine the effect of KOH weight percent as loading metal in OPKS support. From the result shown in previous chapter‚ we can see the trend of graph for each parameter which is yield of FAME increase if concentration of KOH/weight percent of KOH increase. The best KOH concentration that gives the
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the liquid. Combine the following rate expressions for diffusion through the gas and liquid films‚ -rA=kAga(pA-pAi) and -rA=kAlaCAi-CA‚ with Henry’s law pAi=HACAi and the reaction rate equation given above‚ to eliminate the pressure and concentration at the interface (pAi and CAi) and to prove that the final rate expression for the overall rate of the process is -rA=pA1kAga+HAkAla+HAkCB Solution -rA=kAga(pA-pAi) (1) -rA=kAlaCAi-CA‚ (2) pAi=HACAi (3) -rA=kCACB (4) From (1)
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region of higher concentration to a region of lower concentration. This happens because of random molecular motion. Molecules move around randomly until there is an even mixture throughout cell and mixture. The overall effect is that molecules move down a concentration gradient from a region of high concentration to a region of low concentration which is passive transport. Osmosis is the movement of molecules down a concentration gradient and at the same time
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easier to work on Molality. Molality is the solute concentration. Molality of A = no. of moles A dissolved/ no. of kg solvent in solution The boiling point elevation‚ Tb – kbm = ∆Tb ‚ and the freezing point depression Tf – kfm = ∆Tf ‚ uses the concentration. Kb and Kf are characteristics of the solvent used. They use these characteristics to find the molar mass of an unknown substance. Finding an unknown‚ finding two different concentrations‚ then
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