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151.908 g/mol

## What is the formula mass in atomic mass units for FeSO4?

How do I calculate the relative formula mass of FeSO4 and the number of moles, when the formula mass of O=16, S=32, Fe=56 and the mass of FeSO4= 380g. Answered by Henry M.

1 moles

278g

## What is indicated by the formula FeSO4 7H2O?

Iron(II) sulfate heptahydrate, 99.5%, for analysis. FeSO4.7H2O.

## What is the equivalent weight of FeSO4?

So, the molecular weight of ferrous sulphate is 151.8. -Equivalent weight of ferrous sulphate = molecular weight of ferrous sulphate/ involved electron. So, equivalent weight of ferrous sulphate which is present as reductant is 151.8 which is equal to the molecular weight of ferrous sulphate.

6 grams.

## How do you find the equivalent weight of K2Cr2O7?

Equivalent weight=2946=49g/eq. Hence, the equivalent weight of K2Cr2O7 in acidic medium will be 49g/eq. Note: It should be remembered to you that potassium dichromate has a wide range of uses, including as an oxidizer in many chemical and industrial applications and in dying, staining and tanning of leather.

## How do you calculate CaCO3 equivalent?

calcium carbonate (CaCO3) equivalent Alkalinity test results are usually reported as mg/L CaCO3 equivalents. To convert chloride to CaCO3 equivalents, multiply the concentration of chloride ions in mg/L by 1.41, and for sulfate, multiply by 1.04.

## What is equivalent weight of CO2?

The equivalent weight of C in CO2 is 3 g/equivalent as 1C combines with 4 equivalents of O to form CO2, hence we get the equivalent weight of CO2 as 3+2×8=19 g/equivalent which is super weird.

## Why is hardness expressed as CaCO3?

Calcium carbonate is the compound in hard water that causes limescale build-up. Soft water typically has less than 50 ppm of calcium carbonate. Hard water has over 200ppm. This imperial measure of hard water is also called grain per gallon (gpg).

## What is the total hardness in mg L as CaCO3?

Water hardness calculator

Concentration as CaCO3 Indication
0 to 60 mg/L Soft water
60 to 120 mg/L Moderately hard water
120 to 180 mg/L Hard water
>180 mg/L Very hard water

## How do you calculate the hardness of CaCO3?

It is calculated using Eq (2c): NCH (mg/L) = Total hardness-Carbonate hardness (2c) Page 2 Page 2 Determination of Hardness: Hardness is expressed as mg/L CaCO3.

## How do you find the hardness of water in terms of CaCO3?

∴1L (1000ml) of given hard water = mg of CaCO3 eq. Total Hardness of water = 1000 V2/V1 mg/l = 1000 V2/V1 ppm.

## What is the formula of hardness of water?

From the difference we get: NCH = 0.81 meq/L. There is no pseudo hardness (PsH=0). The total hardness is determined by the sum of Ca and Mg: TH = (2×1.40 + 2×0.23) meq/L = 3.26 meq/L – as presented in the diagram above….Alternative Interpretation.

T 10 °C
Ca 1.40 mM
Mg 0.23 mM
Na 0.30 mM
K 0.05 mM

## How is hardness calculated?

If a test for hard water is measured in parts per million or milligrams per liter you can take the total hardness level and divide it by 17.1 to get hardness in grains per gallon. For example if your water test shows 250 mg/L hardness you actually have 14.62 grains per gallon.

## How do you determine the degree of hardness?

As mentioned, the degree of hardness is expressed as parts per million (ppm) and thus may be defined as the number of parts by weight of CaCO3 (equivalent to Mg salts) present in a million (106) parts by weight of water. It is given that 1 kg of water contains 24 mg of MgSO4.

## What is degree of hardness How will you classify water in terms of degree of hardness?

Measures of water hardness General guidelines for classification of waters are: 0 to 60 mg/L (milligrams per liter) as calcium carbonate is classified as soft; 61 to 120 mg/L as moderately hard; 121 to 180 mg/L as hard; and more than 180 mg/L as very hard.

## What do you mean by degree of hardness?

Degree of hardness is defined as the number of parts of calcium carbonate or equivalent to various calcium and magnesium salts present in a million parts of water by mass.

## What is the significance of degree of hardness?

Degrees of general hardness (dGH or °GH) is a unit of water hardness, specifically of general hardness. General hardness is a measure of the concentration of divalent metal ions such as calcium (Ca2+) and magnesium (Mg2+) per volume of water.

## What is difference between temporary and permanent hardness?

The good thing about temporary hardness is that it is easy to remove by boiling or through precipitation with lime (calcium hydroxide). Boiling and adding lime are two of the older methods used to soften water containing temporary hardness. Permanent hardness is simply the hardness that is not removed by boiling.

## What is the meaning of hardness?

Hardness is a measure of the resistance to localized plastic deformation induced by either mechanical indentation or abrasion. Hardness is dependent on ductility, elastic stiffness, plasticity, strain, strength, toughness, viscoelasticity, and viscosity.

## What is pseudo hardness?

 Pseudo-Hardness Sea, brackish, and other waters that contain appreciable amounts of Na+ interfere with the normal behavior of soap because of the common ion effect. Sodium is not a hardness-causing cation, and so this action which it exhibits when present in water in high concentration is termed pseudo-hardness.

2021-06-17