• 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

    masses of precipitates The table above shows the predicted mass of the precipitates formed when two unknown solutions (unknowns A and B) are paired with six ionic solutions in all combinations. By following the process of deductive logic, it was concluded that unknowns A and B were BaCl2 and NaOH respectively.

  1. A Comparison of Strong and Weak Acids and Bases

    1.00 2005 HCl(aq) 0.01 4898 HCl(aq) 0.10 37701 H2O(l) - 48 NaOH(aq) 0.01 2969 NaOH(aq) 0.10 26531 * The range of the conductivity probe for these solution was 0�s - 20,000�s. And the accuracy for the probe was �1%.

  2. Aim: To investigate the chemical properties of the halogens and some of their ...

    He isolated the element by adding sulfuric acid to seaweed ashes. This produced a purple vapor, which condensed to form dark crystals of iodine. Its name comes from the Greek work 'iodes', meaning violet. States State (s, l, g):solid Melting point:386.6 K (113.5 oC)

  1. Strong and Weak Acids And Bases

    Conductivity Level Distilled Water No conductivity 0.001 M hydrochloric acid Faint 0.01 M hydrochloric acid Slightly bright 0.1 M hydrochloric acid Strong 1.0 M hydrochloric acid Strongest 1.0 M ethanoic acid Slightly bright Experiment #3- Action of Weak and Strong Acids on Metals Table 5 -3M Hydrochloric Acid Reaction Prediction of Rate of Reaction (Theoretical)

  2. Electrolysis of copper sulphate

    Interpretation and Evaluation: This electrolysis experiment is was performed using 5 electrolytic cells attached in parallel. This was intended to increase the sample size and thus, minimize random errors by taking repeated measurements of the same action and calculating the average.

  1. Chemistry Titration Acid Base Lab

    Unfortunately, in some cases the bubbles remain near the stopcock. If this is the case, it would be best to use a suction method approach. This involves one to partially open the stopcock allowing the contents of the burette to discharge in the beaker.

  2. Using Silicon - microchips and semiconductors

    When applying a small current to the center layer of the sandwich, a larger current can flow through the sandwich, this gives a transistor its switching behavior.(Brain, 2001) The larger current oscillate between on and off when the small current is present.

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