• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Ionic and Molecular Compounds Lab

Extracts from this document...

Introduction

Title: Ionic and Molecular Compounds Lab Problem: What are some characteristic properties of: * Ionic compounds? * Molecular compounds? * Acids? * Bases? Which of the unknown compounds provided are: * Ionic compounds * Molecular compounds * Acids * Bases Materials: eye dropper eight different known chemical compounds eight unknown chemical compounds spot plate blue and red litmus paper pH test paper strips conductivity tester lab apron safety goggles Procedure: 1. These tests are available to you. a. Conductivity test b. Litmus test c. pH paper 2. Also record qualitative data 3. Classify compound into one of these categories: a. a. ionic b. molecular c. acid d. base Observations: Substance Formula with state Litmus (B-R or R-B...) ...read more.

Middle

Substance Formula Type of compound boric acid H3BO3(aq) acid Phosphoric acid H3PO4(aq) acid sodium hydroxide NaOH base Ammonium hydroxide NH4OH base Copper (II)sulphate+ pentahydrate CuSo4.5H2O+H2O ionic Sodium chloride+ water NaCl+H2O ionic Glucose+ water C6H12O6+H2O molecular Silicon dioxide (silica)+ water SiO2+H2O molecular Unknown2 / molecular or acid Unknown3 / Ionic Unknown4 / base Unknown6 / ionic Unknown7 / base Unknown8 / acid Unknown9 / acid Unknown10 / molecular 2. Type of compound Characteristics Ionic compounds conduct electricity, contains positively and negatively charged elements, high melting point, high boiling point Molecular compounds do not conduct electricity, contains only negatively charged elements (anions), low melting point, low boiling point Acids has a pH level less than 7, have H at the start or end of formulas, tastes sour, not slippery Bases usually contains hydroxide, has a pH level greater than 7, ...read more.

Conclusion

Unknown 8 had a pH level of 4, and unknown 9 had a pH level of 1. Unknowns 4 and 7 could be bases because they both had a pH level of 14, making them very basic. An error that was made in this experiment is that each of the substances could be contaminated when the litmus paper was put into them for too long, and the chemicals on the litmus paper may dissolve in the substances. Also, a substance could be contaminated when the conductivity tester was previously dipped into another substance, and is not cleaned thoroughly before being put into the next substance. One of the improvements that can be made is that try not to leave the litmus paper in the substance for too long. Also, a different conductivity tester could be used for each of the substances to minimize the amount of contamination. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our International Baccalaureate Chemistry section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related International Baccalaureate Chemistry essays

  1. The purpose of this lab experiment is to determine whether different ionic compounds containing ...

    Vernier's Logger Pro 6. Weigh boats 7. Balance 8. Ionic compounds in solid state * NaI * NaCl * NaF 9. Spatula (to add ionic compounds onto the weigh boats) Procedure: 1. Set up the gas pressure sensor close to the station where the measuring will occur so as not to loose any ethanol if it evaporates a.

  2. Using Solubility Rules to Indentify Unknown Solutions

    In other words, although the spectator ions do not undergo a chemical change themselves, they help maintain a balance between the electrical charges in the solution. The magnesium and hydroxide ions however, even though both were aqueous to start, reacted with each other to form an insoluble compound which eventually sinks to the bottom when rested, to form a precipitate.

  1. Physical Properties of Organic Compounds

    What is the functional group in a carboxylic acid? A carboxylic acid consists of a carboxyl group, C(=O)OH 10) Compare the boiling points of similar masses carboxylic acids with alcohols and aldehydes. Carboxylic acids have much higher boiling points than alcohols and aldehydes. This is due to a more extensive association of carboxylic acids through intermolecular hydrogen bonding.

  2. A Comparison of Strong and Weak Acids and Bases

    And the accuracy for the probe was �1%. This concludes to the uncertainty being �200�s as * Due to the different conductivity probe range, a separate table for NH3(aq) was made. Table 2.0: The conductivity of NH3(aq). Solution Concentration of solution / mol dm-3 Conductivity of solution / �s (� 20 �s )

  1. Strong and Weak Acids And Bases

    Rate of Reaction(Experimental) Observations Mg + 2HCl -->H2 (g) + MgCl2 Fast Fast Bubbles, foggy, H2 gas forming Zn + 2HCl -->H2 (g) + ZnCl2 Slow Slow Bubbles, foggy, H2 gas forming Cu + 2HCl -->H2 (g) + CuCl2 Slow Slow Bubbles, foggy, H2 gas forming Table 6 -3M Ethanoic Acid Reaction Prediction of Rate of Reaction (Theoretical)

  2. Electrolysis of copper sulphate

    For example, if current where to double in magnitude so would the mass deposited on the cathode. This makes sense since, as current increases, more electrons are passed into the cell and so should increase the amount of copper deposited at the cathode proportionally to the amount of electrons.

  1. To determine the molecular mass of an unknown alkali metal carbonate, X2CO3.

    Some other possible shortcomings to this experiment are also listed below: 1. The solid substance Z might not be pure Sodium Carbonate and some impurities present could have led to the overstatement of the value for the molecular mass of X2CO3.

  2. Chemistry Titration Acid Base Lab

    This burette would ensure that a considerably small amount of sodium hydroxide would be discharged from the device at most. A button will be pressed to stop the base from entering the beaker containing the acid electronically. The accuracy of this instrument is within ±0.2%, and precision is better than

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work