| Date | May 2015 | Marks available | 1 | Reference code | 15M.1.sl.TZ1.15 |
| Level | SL | Paper | 1 | Time zone | TZ1 |
| Command term | Question number | 15 | Adapted from | N/A |
Question
The heat change in a neutralization reaction can be determined by mixing equal volumes of HCl(aq) and NaOH(aq) of the same concentration in a glass beaker. The maximum temperature change is recorded using an alcohol thermometer.
What is the biggest source of error in this experiment?
A. Heat absorbed by the glass thermometer
B. Random error in the thermometer reading
C. Heat loss to the surroundings
D. Systematic error in measuring the volumes of HCl(aq) and NaOH(aq) using burettes
Markscheme
C
Examiners report
[N/A]
Syllabus sections
Core » Topic 11: Measurement and data processing » 11.1 Uncertainties and errors in measurement and results
Show 68 related questions
- 17N.3.sl.TZ0.3c: Calculate the percentage of water by mass in the NaCl•2H2O crystals. Use the data from...
- 17N.3.sl.TZ0.2c: Calculate the uncertainty in the change in pH.
- 17N.1.sl.TZ0.30: A student performs an acid-base titration using a pH meter, but forgets to calibrate it....
- 17M.3.sl.TZ2.2b.ii: Suggest one improvement to the investigation.
- 17M.3.sl.TZ2.1c.iii: The change in APO O2/N2 ratio, per meg, is measured relative to an O2/N2...
- 17M.3.sl.TZ2.1b: O2 is consumed in producing CO2 for electricity generation. The graph shows the relationship...
- 17M.2.sl.TZ2.2b.i: Calculate the percentage uncertainty for the mass of K2Cr2O7(s) from the given data.
- 17M.2.sl.TZ2.1a.ii: Suggest why the final mass of solid obtained by heating 3.760 g of AgxOy may be greater than...
- 17M.3.sl.TZ1.5f: Outline why the thermochemical method would not be appropriate for 0.001...
- 17M.3.sl.TZ1.5b: Heat losses would make this method less accurate than the pH probe method. Outline why the...
- 17M.3.sl.TZ1.1b: Suggest how the precision of this measurement could be improved.
- 17M.1.hl.TZ1.38: The molar mass of a gas, determined experimentally, is 32 g mol−1. Its literature molar...
- 17M.1.sl.TZ1.29: What is the density, in g\(\,\)cm−3, of a 34.79 g sample with a volume of 12.5 cm3? A. ...
- 16N.2.sl.TZ0.3g: Suggest one reason why the values of rates of reactions obtained at higher temperatures may...
- 16N.1.sl.TZ0.30: A student measured the change in mass on heating a sample of calcium carbonate, CaCO3(s)....
- 16M.3.sl.TZ0.2b: (i) State the colour change of the indicator that the student would see during his titration...
- 16M.3.sl.TZ0.2a: Outline, giving your reasons, how you would carefully prepare the 1.00dm3 aqueous solution...
- 16M.1.hl.TZ0.38: ...
- 16M.1.sl.TZ0.28: What is the relationship between the two variables sketched on the...
- 16M.1.sl.TZ0.27: A measuring cylinder was used to obtain a known volume of a liquid. The...
- 15M.2.hl.TZ1.6f.iii: A student measures a voltage of 2.65 V in the voltaic cell formed between magnesium and...
- 15M.2.hl.TZ1.6f.iv: Outline how the student can reduce the random error in her results.
- 15M.2.hl.TZ1.5c: Students can also measure the enthalpy of combustion of ethanol in the laboratory using...
- 15M.1.sl.TZ1.30: A student weighs a standard 70.00 g mass five times using the same balance. Each time she...
- 15M.1.sl.TZ2.30: What is the best way to minimize the random uncertainty when titrating an acid of unknown...
- 15M.2.sl.TZ1.1a: State the uncertainty of the volume of NaOH added in \({\text{c}}{{\text{m}}^{\text{3}}}\).
- 15M.2.sl.TZ2.1b.iii: The accepted theoretical value from the literature of this enthalpy change is...
- 14M.2.hl.TZ2.1b: The concentration of ethanoic acid can be calculated as...
- 14M.2.hl.TZ2.1c.i: Calculate the absolute uncertainty of the titre for Titration 1...
- 14M.1.sl.TZ2.30: Which statement about errors is correct? A. A random error is always expressed as a...
- 14M.1.sl.TZ1.30: A student carries out a titration three times and obtains the following volumes:...
- 14M.2.sl.TZ2.1c: Identify the liquid whose volume has the greatest percentage uncertainty.
- 14M.2.sl.TZ2.1d: (i) Calculate the absolute uncertainty of the titre for Titration 1...
- 14N.2.hl.TZ0.1b: Calculate the percentage uncertainty in the measured pH of the rain water sample.
- 14N.1.sl.TZ0.30: In an experiment to determine a specific quantity, a student calculated that her experimental...
- 14N.2.sl.TZ0.1b: Calculate the percentage uncertainty in the measured pH of the rain water sample.
- 13N.2.hl.TZ0.1a: The concentration of iodide ions, \({{\text{I}}^ - }\), is assumed to be constant. Outline...
- 13N.1.hl.TZ0.40: A student measured the mass and volume of a piece of silver and recorded the following...
- 13N.2.hl.TZ0.1b: For this mixture the concentration of hydrogen peroxide,...
- 13N.2.hl.TZ0.1d.i: Calculate the total uncertainty, in \({\text{c}}{{\text{m}}^{\text{3}}}\), of the volume of...
- 13N.2.hl.TZ0.1d.ii: Calculate the percentage uncertainty of the concentration of potassium iodide solution added...
- 13N.2.hl.TZ0.1d.iii: Determine the percentage uncertainty in the concentration of potassium iodide in the final...
- 13N.1.sl.TZ0.30: A student measured the mass and volume of a piece of silver and recorded the following...
- 13N.2.sl.TZ0.1d: For this mixture the concentration of hydrogen peroxide,...
- 13N.2.sl.TZ0.1c: The concentration of iodide ions, \({{\text{I}}^ - }\), is assumed to be constant. Outline...
- 13N.2.sl.TZ0.1f: Apart from the precision uncertainties given, state one source of error that could affect...
- 13M.1.sl.TZ1.30: Which would be the best method to decrease the random uncertainty of a measurement in an...
- 13M.2.sl.TZ1.1a: Calculate the mass of the acid and determine its absolute and percentage uncertainty.
- 13M.2.sl.TZ2.1a: When the \({\text{F}}{{\text{e}}^{2 + }}{\text{(aq)}}\) solution was made up in the...
- 13M.2.sl.TZ2.1b: State what is meant by the term precision.
- 13M.2.sl.TZ2.1c: When the students recorded the burette readings, following the titration with KMnO4 (aq),the...
- 12N.1.sl.TZ0.30: \({\text{50 c}}{{\text{m}}^{\text{3}}}\) of copper(II) sulfate solution is measured into a...
- 12N.2.sl.TZ0.1a: (i) State the number of significant figures for the masses of...
- 10N.1.sl.TZ0.30: Density can be calculated by dividing mass by volume. \(0.20 \pm 0.02{\text{ g}}\) of a metal...
- 09N.1.sl.TZ0.30: Which are likely to be reduced when an experiment is repeated a number of times? A. ...
- 10M.1.sl.TZ2.30: How many significant figures are there in 0.00370? A. 2 B. 3 C. 5 D. 6
- 09M.1.sl.TZ1.30: A student recorded the volume of a gas as \({\text{0.01450 d}}{{\text{m}}^{\text{3}}}\). How...
- 09M.1.sl.TZ2.30: Which would be the best method to decrease the random uncertainty of a measurement in an...
- 09M.2.sl.TZ2.1b.v: Another student repeated the experiment and obtained an experimental yield of 150%. The...
- 09M.2.sl.TZ2.1b.iv: State the number of significant figures associated with the mass of pure aspirin obtained,...
- 11M.1.sl.TZ1.30: A burette reading is recorded as \(27.70 \pm 0.05{\text{ c}}{{\text{m}}^{\text{3}}}\). Which...
- 11M.2.sl.TZ1.4b: If the fuel blend was vaporized before combustion, predict whether the amount of energy...
- 11M.1.sl.TZ2.30: A piece of metallic aluminium with a mass of 10.044 g was found to have a volume of...
- 11M.2.sl.TZ2.1c.i: Calculate the percentage error obtained in this experiment. (If you did not obtain an answer...
- 11M.2.sl.TZ2.1c.ii: The student recorded in her qualitative data that the anhydrous copper(II) sulfate she used...
- 11N.1.hl.TZ0.40: A student heated a solid in a crucible. The student measured the mass of the solid and...
- 11N.2.sl.TZ0.1b.i: State the number of significant figures for the temperature, mass and pressure data. T: m: p:
- 11N.1.sl.TZ0.30: A student heated a solid in a crucible. The student measured the mass of the solid and...
