StudentShare
Contact Us
Sign In / Sign Up for FREE
Search
Go to advanced search...
Free

Change in Boiling Point of Water with Molarity - Essay Example

Cite this document
Summary
This is experiment verifies the effect of common salt on the boiling point of water. In it beakers filled with the same of amount of distilled water containing different amounts of dissolved common salt are used and the aim is to determine the boiling point of the aqueous solution in each beaker…
Download full paper File format: .doc, available for editing
GRAB THE BEST PAPER98.8% of users find it useful
Change in Boiling Point of Water with Molarity
Read Text Preview

Extract of sample "Change in Boiling Point of Water with Molarity"

Introduction This is experiment verifies the effect of common salt on the boiling point of water. In it beakers filled with the same of amount of distilled water containing different amounts of dissolved common salt are used and the aim is to determine the boiling point of the aqueous solution in each beaker. The expectation is that the aqueous solution with more dissolved NaCl will boil at a higher temperature.Methods and MaterialsFour beakers were taken and labelled A, B, C and D respectively.

All the beakers were filled with 100ml of distilled water measured with a standard test tube. In the beaker A NaCl was not dissolved. Concentration of this solution was expressed as 0 molar aqueous solution (0M). In beaker B 5.8gms of NaCl was dissolved and hence a 1 molar aqueous solution (1M) was obtained. In the beaker C 17.4gms of NaCl was dissolved and hence a 3 molar aqueous solution (3M) was obtained. Lastly in the beaker D 29.0gms of NaCl was dissolved and the molarity of this aqueous solution was 5M.

Then the beakers were heated on a burner and the temperature at which boiling commenced was recorded with a thermometer.ResultsThe boiling point of water in the beakers A, B, C, D were observed to be 100oC, 101.4oC, 103.12o C, 105.2oC respectively. The above results can be summarized as follows in a tabular formBeaker LabelABCDMolarity of aqueous solution0M1M3M5MBoiling point of water observed100oC101.04oC103.12oC105.2oCGraphically these values are:Discussion and ConclusionsIt is very clear that boiling point of the solution increases with molarity of the aqueous solution.

It implies that the boiling point of water and the amount of dissolved salt, or molarity of the solution, are in direct proportion. If the increase in temperature were to be denoted by t and the molarity of the aqueous solution by M and if k were to be a constant, then, t = kM On using the observed values it can be seen that for beaker A and Beaker B, t = 101.04oC - 100oC = 1.04oC kM = k* 1 t = kM 1.

04oC = k* 1 Therefore, k = 1.04 degrees Celsius litres per mole.Hence a relationship between the increase in boiling point of water and the molarity of the aqueous solution has been established as given by the equation just derived. t = 1.04*M.These results prove the assumption that the aqueous solution with more dissolved NaCl will boil at a higher temperature. Whilst conducting the experiment care has to be taken to ensure that, 1) Each of the four identical beakers contains 100ml of water.2) This water should be distilled.3) The salt should be pure and not a homogenous mixture. 4) The exact amounts of salt to get 0M, 1M, 3M, 5M aqueous solutions respectively should be dissolved in the water in the beakers.

The formula Molarity = Moles of solute/Liters of Solution should be used for this purpose1. If above precautions are not followed then there will be a variation in results depending on the extent of error in the quantities of salt and water.Some of controlled variables are Normal Pressure of 1 atmosphere, Identical beakers in all regards like made of same dimensions and material, The burner level, Pure distilled water, etc. The independent variable was the molarity and the dependent variable was the temperature.

Hence it can be concluded that the boiling point of water increases with increase in the amount of dissolved NaCl.

Read More
Cite this document
  • APA
  • MLA
  • CHICAGO
(“Change in Boiling Point of Water with Molarity Essay”, n.d.)
Change in Boiling Point of Water with Molarity Essay. Retrieved from https://studentshare.org/miscellaneous/1516678-change-in-boiling-point-of-water-with-molarity
(Change in Boiling Point of Water With Molarity Essay)
Change in Boiling Point of Water With Molarity Essay. https://studentshare.org/miscellaneous/1516678-change-in-boiling-point-of-water-with-molarity.
“Change in Boiling Point of Water With Molarity Essay”, n.d. https://studentshare.org/miscellaneous/1516678-change-in-boiling-point-of-water-with-molarity.
  • Cited: 0 times

CHECK THESE SAMPLES OF Change in Boiling Point of Water with Molarity

Blood Gas Analysis and Osmometry

Osmolarity refers to osmoles per litre, whilst osmolality refers to osmoles per kg water( There is a slight difference between plasma molality and molarity because of the non-acqueous components present such as proteins and lipids that make up about 60% of the total volume.... Thus serum is only 94% water and the molality of a substance in serum is about 6% higher than its molarity....
6 Pages (1500 words) Lab Report

What Is the Difference between an Ionic and a Covalent Bond

Both the melting and boiling points for an ionic bond are quite high.... The questions include topics such as ionic and a covalent bonds, ionic compounds, covalent compounds and polymers.... Thus the answers give a clearer picture of the topics related to chemistry. A compound or a molecule is… These chemical bonds are of two main types, namely covalent bonds and ionic bonds....
4 Pages (1000 words) Essay

Critical Thinking Assignment

??Do the physical properties of water change when a compound is dissolved in water?... ?? The chemical formula of water is H2O.... When chemical compounds are introduced in water, reactions occur because of the differences in polarity and electro negativity of water in relation to other substances (John 60).... The material tendencies of water undergo modification when a compound is dissolved in water.... The difference is visible with the chemical properties, boiling point and characteristics of the new compound....
2 Pages (500 words) Essay

Impact of a water Jet laboratory

After this part, the next procedure was to add about 300 mL of tap water with a temperature of 20–25°C to a 400 mL beaker and then placing the beaker on the base of the ring stand.... This was possible by first determining the freezing point of pure lauric acid and lauric- benzoic mixture, then calculating the molality of solution and the moles of benzoic acid as shown below.... In this lab Experiment the apparatus and materials used included Lab Quest , Lab Quest App Temperature Probe, two 18 × 150 mm test tubes 400 mL beaker, ring stand, paper towel or tissue 4 – 1, Lab Quest 4, lauric acid, CH3(CH2)10COOH lauric acid-benzoic acid mixture hot water bath and the utility clamp....
6 Pages (1500 words) Lab Report

Pyrolysis of Aryl Sulfonate Esters in the Absence of Solvent: E1 or E2

a) boiling point of water at 25 torr = 95⁰b) The water does not boil at 25⁰ and 25 torr.... The column oven should have temperature above the dew point of the least volatile component in the sample because low temperatures produces the greatest level of separation.... The temperature should be above the dew point of the least volatile component in order to avoid condensation from occurring in the column.... Molecular properties that separation of substances using GC is based on are polarity, boiling point and solubility....
2 Pages (500 words) Assignment

Hydrogen Bonding and the Importance to Life

This element is basic in the compounds of water and organic matter.... This essay will attempt to correlate hydrogen bonding as essential to sustainability to life.... The researcher of this essay will make an attempt to define the basic theory first before proceeding to the technical and so complex thought of hydrogen bonding....
6 Pages (1500 words) Term Paper

Affecting the Boiling Point of Miscible Mixtures of Solvent

The change in boiling point will be determined using the van Hoff factor which determines temperature elevation when a solute is added to a solvent.... There are factors that affect the boiling point of substances but in this case, miscible mixtures of solvents will gain more attention.... hellip; The experiment will mainly focus on the chemistry related factor that affects the boiling point of miscible mixtures of solvents; this is the research question The paper "What Chemistry Related Factor Affects the boiling point of Miscible Mixtures of Solvent" is a worthy example of a lab report on chemistry....
3 Pages (750 words) Lab Report

Intermolecular Attraction Forces

Non-polar solutes such as paraffin do not dissolve in ethanol and water since they are polar.... When bonds between particles are made more polar, the particle charges increase resulting in stronger intermolecular forces which lead to high melting and boiling points....
5 Pages (1250 words) Essay
sponsored ads
We use cookies to create the best experience for you. Keep on browsing if you are OK with that, or find out how to manage cookies.
Contact Us