Echantillions

Mass of raw sand before test (g)

m_b

Mass of sand after destruction by acid (g)

m_sd

Mass of sand after sorting out (g)

m_st

Difference of mass (g):

Δd = m_st − m_sd

Relative error

(%)

Err = (Δd/(m_b − m_sd)) × 100

1

2

0.72

0.75

0.03

2.34

2

4

0.69

0.78

0.09

2.72

3

6

1.6

1.79

0.19

4.32

Average

3.12