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The effect of temperature on salinity and pH of seawaterFeatured science projectScience project video

Observation

The level of water fell as the temperature of the seawater increased indicating a higher rate of evaporation. The increasing temperature also increased the specific gravity and the pH of the seawater after 24 hours.

Measurement

Seawater condition with increasing temperatures measured after 24 hours

20 °C

25 °C

30 °C

35 °C

40 °C

45 °C

50 °C

55 °C

60 °C

65 °C

Water height (cm)

9.9

9.8

9.6

9.3

8.9

8.4

7.8

7.1

6.2

5.1

pH

7.65

7.70

7.75

7.80

7.85

7.95

8.05

8.15

8.30

8.70

Specific gravity (mg/ml)

1.025

1.030

1.040

1.055

1.075

1.090

1.110

1.140

1.160

1.210

The graph below represents the results of our science project experiment:

Salinity and temperature science project

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Complexity level:
8
Project cost ($):
30
Time required:
1 hour to prepare, 2 days for the science project experiment
Material availability:
Access to basic laboratory equipment required.
Safety concerns:

Handle hot plates carefully