A voltmeter reading is recorded as 100.0 Vbu p6l03qewc+p .jgx+5vn 4dj +/- 2%. Which of the following could be the acb0+3gvc.pp6+dx 4 jwu5nle j qtual value?

I.98.0V
II.97.2V
III.101.3V

  A student recorded the lji fx:c0xp 0h1 *h6rm,8tgjlvolume of a gas as 0.04056m$^3$. How many significant figures does the recorded value have?

  Which of the below features must be includb2g6xhpegf5;v 2snctfqa8fq 3w6l) 7ed in a sketched graph?

I.Labelled axes
II.Scaled axes
III.Plotted points

  For the graph below, state l1vrbu*a5w j*the appropriate units for the y-intercept.

  Which statement best describes the relationship between x and y on the g( ek4 :ar)hmqby *a8:5xdbz eqraph belowed z:b (qbr5hm q:xaak*4 )e8y?

For a first order reawv2; o* de*raaction, the relationship between rate and the concentration of a reactant, [A], can be shown using the followoe;wd *2aa v*ring equation: rate =k[A].
The data below gives the rate information for the first order reaction that proceeds in the thermal decomposition of reactant A.



1.On the axes above, draw a graph based on the provided data.
2.The effect of time on the concentration of reactant B for a zero-order reaction was plotted on the graph below.

(i)Draw a line of best fit on the graph above.
2.Describe the relationship between time and concentration.

  Which of the below gives the correct units for e96 pi /e3eqzr1f:yt athe gradient of this line?

  A student is measuring the temperature change of an endothermic reaction. 8towi(r yct(,id 9kv8
Calculate the temperature change and identify the corresponding error.



Temperature decrease:  $^{\circ}C$$\pm$  $^{\circ}C$

  The relationship between pressure and temperature of k.*qnv(0ja1o vw5le l a known volume and amount of gas can be described using Gay-qwav.lj n01elo *5vk(Lussac’s law which states that pressure is directly proportional to temperature.P∝T
Where P is pressure in Pa, and T is temperature in K.




1.On the axes above, sketch the graph of P∝T.

2.State two features that would need to be added to your sketched graph to turn it into a drawn graph.

3.The proportionality can be shown in an equation by incorporating a constant, k. The equation becomes P=kT, and follows the format of the equation of a straight line.

3.1.State the feature of a straight line that k represents in this context.
The feature is   .
3.2.Deduce the y-intercept of the straight line.
it is   (Pa).

  What is the value for the gradient of the graph below with the correcavsxgwgo7lys/8v, g fjqc6d(* 6-d ;-6muh hjt units?

  A given mass of magnesium was added to 500cm$^3$ of aqueous hydrochloric acid in a Styrofoam cup to form magnesium chloride. The temperature at the start was 18$^{\circ}C$ and and after the magnesium had dissolved, the temperature rose to 20$^{\circ}C$.
1.State a balanced chemical equation for this reaction.
2.Given that the change in enthalpy,ΔH is 0.185kJ and the specific heat capacity of water is 4.18J g$^{-1}$K$^{-1}$,calculate the mass of magnesium added to the hydrochloric acid.
m=  g
3.Determine the systematic errors caused by the use of styrofoam cups.

Solid sodium carbonate reacts with excess nitric acid of 0.1 mol dm$^{-1}$ as shown in the equation below:
$Na_2CO_3$(s)+2$HNO_3$(aq) → $H_2O$(l) +$CO_2$(g)+2$NaNO_3$(aq)
1.State a method to measure the rate of reaction other than measuring the volume of gas collected.
2.1.Sketch a graph to show the volume of gas produced over time.
2.2.Explain the shape of your graph using the collision theory.


3.On the same graph as in part(bi), sketch another line to show the volume of gas collected over time at a concentration of 0.05 molcdm$^{-3}$ of nitric acid and label it as X.


4.Suggest and describe a factor other than the concentration that can affect the rate of the above reaction.

  Which statement best describes the relationship between the rate yj;, m(asp d,3mj/guh58knkdand H$^+$ oncentration, in a graph with the equation: rate =k[H$^+$]$^2$?

  In a first order reaction, the concentration [A] of a given reactant fnkdg+t;az*ksn n vx);tk , :9can be determined at time t, according to the , sf+n at:)ng;xdktz;v*9k knequation below, where [A]$_o$ is the initial concentration of A and k is the rate constant.
ln[A]=-kt+ln[A]$_o$

  The enthalpy of neutralization for the reactionpab5u z0k+ aa*gtaqh 8vg//8a between sulfuric acid and potassium hydroxide can be determined experimentalpkqt va+/* a0gag zh8bua/ 85aly.
$H_2SO_4$(aq)+2KOH(aq)→$K_2SO_4$(aq)+2$H_2O$(l)
A student recorded the temperature of 20.0cm$^3$ of 0.500 mold m$^{-3}$
sulfuric acid every minute. At four minutes,25.0cm$^3$KOH(aq) is added to the solution, stirred immediately, and temperature recorded for another four minutes. The results are represented in the graph below.

1.Calculate the lowest concentration of aqueous KOH that must be used to ensure it is in excess.
C$_{KOH}$=  mold m$^{-3}$
2.Use the graph above to estimate a value for the maximum temperature change,ΔT.
ΔT=  $^{\circ}$
3.State one assumption you made in part (b).
4.Identify the anomalous result and suggest a possible type and source of error.
5.In another experiment with the same reactants, the student measured the initial and final temperatures and presented their results below:
Initial Temperature ($^{\circ}$C $\pm$$^{\circ}$C) 24.8 25.1 24.9
Final Temperature($^{\circ}$C $\pm$$^{\circ}$C) 26.4 26.6 26.4
1.Calculate the average change in temperature (ΔT)giving its percentage uncertainty.
Average=  $^{\circ}$C; Absolute uncertainty=$\pm$  $^{\circ}$C; Percentage uncertainty=  %
2.Use sections 1 and 2 of the data booklet to calculate the energy released and its uncertainty. You may assume that the only source of uncertainty is from the temperature change.
Energy released (q)=  J;Uncertainty=$\pm$  J

  Determine the type of variable and correct axis for ΔH in a graph to cn inc.+ia15 wshow how ΔHici. ncw+n1a 5 is affected by the length of the carbon chain.

  The initial mass of a mortar containing a solid was recorded to be 10.) 7xfmx3uwgkz-x 5wl 9.34 g. The mortar was heated, and the final mass was recorded to be 81.92 g. What value shog-xw 7. xz3f5wxluk)muld be recorded for the mass lost in grams?

  The half-life of a second order reaction can be expressed accoo/t+ k phjzpm6f8 8g4q)ymi+jrding to the equat q6 mzg 8jkfy/8)m+p+h4tojipion below.
t$^{$\frac{1}{2}$}$=$\frac{1}{k[A]_0}$
Where t$^{\frac{1}{2}}$ =half-life,[$[A]_0$]= initial concentration of reactant A,and k is a constant.
Which two variables plotted against each other would produce a straight line?
I.t$^{\frac{1}{2}}$ VS $\frac{1}{k}$
II.t$^{\frac{1}{2}}$ VS $[A]_0$
III.t$^{$\frac{1}{2}$}$ VS $\frac{1}{[A]_0}$

  A piece of sodium met chh4a(yc:nync 7-pn1al has a mass of 13.02 g and a volume of 13.4 cm$^3$. What is the most precise density that can be reported?

1.State the complete bo9rwi/2azg4kxs -i0v j wdy+*alanced equation for the reaction between sulphuric acid anxvisw/ *iz240yja+dro-w k 9 gd copper (II) oxide.
2.State the complete balanced equation for the reaction between ethanoic acid and potassium carbonate.
3.Outline two ways to monitor the rate of reaction for reaction (b) above.

  The relationship between energy, E, and wave ov jlr6us9tx *;y2e8s ss7u1 4meqx7w+l(wi ylength, λ, is shown according to the equation be8 lx7sqvo uy4s+76mse*w9 2( ly;j1xisuwt erlow.
E=$\frac{hc}{λ}$

Which of the below statements are correct for the graph below representing E=$\frac{hc}{λ}$?
I.Energy and wavelength are directly proportional
II.The units for the gradient are J m$^{-1}$
III.The y-intercept has the units J

  The feasibility of a reactir(xq 71m-y dfnon proceeding spontaneously can be predicted using th (- qmfryd7xn1e following equation:
ΔG=−TΔS+ΔH.
Where ΔG is the change in Gibb’s free energy, ΔS is the change in entropy, and ΔH is the change in enthalpy.




1.When ΔG<0, a reaction can be described as spontaneous. Use the graph above to deduce the lowest temperature at Read graph at which the reaction becomes spontaneous.
Read graph at ΔG=0,  K.
2.Calculate the gradient of the line and state its units.
3.Use your answer to part (b) to deduce the value and correct units for ΔS.
ΔS=  kJ mol$^{-1}$K$^{-1}$
4.Use the graph to determine the value for ΔG when the temperature is raised to 675K.
5.Calculate a value for y-intercept and state the correct units.
Substitution of (x,y) values and slope into equation with correct evaluation=  .(c=)

  The potential of a cell under n.cctcu.eip9 3d 9q4:h g)e(a-o pqkie on-standard conditions can be calculated using the Nec iqcp3 ( h-.ea :o.9ug9qep tki)c4dernst equation:
E=E$^θ$=$\frac{RT}{nF}$ln$_Q$
For the graph below, which components of the equation represent the gradient and the y-intercept?

  The relationship between theowa7nw/dom 3r v5l.0m concentration of a reactant, A, and the time, for a second-order reaction can be e./aom 0nwodr w735lvm xpressed using the equation below:
$\frac{1}{[A]}$=kt+$\frac{1}{[A]_o}$
Where [A] is the concentration of reactant A,$[A]_o$,is the initial concentration of reactant A,t is the time in seconds, and k is a constant.

1.Calculate the gradient of the line and state the correct units.
2.Use the graph to determine $[A]_o$ (also known as the initial concentration of A)
$[A]_o$=  mol dm$^{-3}$
3.Determine the time at which the concentration of A is equal to an eighth of its initial concentration.
(If you were unable to complete parts (a), and (b), you may use k=0.02, and $A_o$=42)
[A]=  mold m$^{-3}$;Substitute and rearrange:  seconds

  Which of the below gives the correct average titre wx) hyy7fcf,-nith its uncertainty?
Initial volume $\pm $0.05 c m$^{3}$ 0.00 23.15 0.00
Final volume $\pm $0.05 c m$^{3}$ 23.15 46.25 23.20

  The length of a thread was being measured using a 50 cm o ah 3ys bi/ *ohzt9ehs ).v6cii5)nq.wooden ruler with a 1 mm increment. The reading for the beginning of the thread was 12.6 cm while the readingh i9 *is sa/ob z)6qvh.ih5yoe.n)tc 3 for the end of the thread was 45.3 cm. Which of the following is the largest possible length of the thread?

  The ideal gas equation allows pressure to be calculated accfyu5otnrv)/ *za *fot* bgtd 64/ rgk1ording to the equation vg*oor u)tft41n *6a/y*z/rd kt gbf5,
P=$\frac{nRT}{V}$.
This allows a straight line to be drawn for the effect of $\frac{1}{V}$ on P.

For the sketched graph above, which components of the equation P=$\frac{nRT}{V}$,relate to the gradient and
y-intercept of the straight line?

  A student recorded the mass of solid NaCl as 1200 g. Which of the follz8, altm na-sx8c o9y;owing is correct about the number of significant figures recordt,alm s zya- cxn;88o9ed?

  2.00 ± 0.02 g $NaClO_3$ were dissolved in 2.0 ± 0.5 dm$^3$ distilled water.

Which row gives the correct concentration in gd m$^{-3}$ and relative uncertainty?

  A student is measuring the density of a solution. He recorded th53mdx14viv2y v ,u5k.erjy h. n its3ze data in the following tx31iid5.yh r3 ke 5st.v 4nm2uv,jyvzable.

1.Write the expression of the average density of the solution in a fraction form (make sure to include the absolute uncertainties for each physical quantity).
2.Calculate its corresponding uncertainty. Show your work clearly.
   $\pm$    %