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u can chek the hardness by pH scale...lolz
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∙ 12y ago
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Why you need sampling distribution?
in order to calculate the mean of the sample's mean and also to calculate the standard deviation of the sample's
How do you calculate mineral contents of the sample?
We would need to know what sample you are referring to in order to answer this question.
How do you calculate sample size?
Count up the number of obseravtions made on the experimental units. That is the sample size.
How do you calculate density using a formula?
Density of a substance = (mass of a sample of the substance) divided by (volume of the same sample)
How do you calculate the mean of the sampling distribution of the sample proportion?
i dont no the answer
How do you Calculate the total hardness of water sample that contains ppm magnesium and ppm calcium?
Answer will be (mg/L) as CaCO3 units of ppm are the same as mg/L. Hardness = 2.5(mg Ca/L) + 4.1(mg Mg/L) In this case: 2.5x78.4 + 4.1x104.5 = 624.45 mg/L
Why hardness is a intensive?
Because the hardness is not dependent to the size of a material sample.
Why is ammonia-sodium chloride buffer solution is added in the determination of total hardness of water?
Ammonia-sodium chloride buffer solution is added in the determination of total hardness of water to prevent interference from other ions that may be present in the water sample. It helps to maintain a constant pH level, ensuring the validity of the hardness test results. Additionally, the buffer solution can help stabilize the complexation reactions between the calcium and magnesium ions in the water sample with the chelating reagent used in the hardness test.
Sample problem on speed and its solution?
hardness
What sample of hardness material?
magnets steal
How do you calculate the concentration of oxygen in sample water?
One common method to measure oxygen concentration in water is to use the Winkler method, where oxygen is chemically fixed and titrated with a reducing agent. Another method is using an oxygen probe (or meter) that measures the dissolved oxygen in water. Both methods provide a numerical value representing the concentration of oxygen in the water sample, usually expressed in milligrams per liter (mg/L) or parts per million (ppm).
A corrosion technologist pipetted a 100 ml hard water sample and titrated it with 37.64 ml of 0.01 m edta solution for a total hardness endpoint and 29.32 ml of 0.01 m edta solution for a calcium?
The total hardness of the water sample is calculated as 37.64 ml of 0.01 M EDTA solution. The calcium hardness is calculated as the difference between the total hardness and the magnesium hardness, which is 29.32 ml of 0.01 M EDTA solution. It's important to conduct proper titration techniques to ensure accurate results for water quality assessment.
Is hardness extensive or intensive?
No matter what size a sample is, if is hard, it will still be just as hard. This means that hardness is an intensive properties. Intensive properties do not matter what size of sample is being used. Extensive properties will change if sample size is changed.
Which does not cause hardness of water?
Distilled water does not contribute to water hardness as it does not contain minerals such as calcium and magnesium responsible for the hardness of water.
What percent of your original foul water sample did you recover as purified water?
To calculate the percentage of purified water recovered, divide the amount of purified water collected by the initial volume of the foul water sample, then multiply by 100 to get the percentage.
How do you calculate how much water is released in a sample of copper sulfate?
To calculate how much water is released in a sample of copper sulfate, you need to determine the difference in mass before and after heating the sample. Heat the sample to drive off the water, then weigh the sample again. The difference in mass is the amount of water released from the copper sulfate.
What is the hardness of anthracite coal?
Anthracite coal has a hardness of 2.2-2.9 on the Mohs scale of mineral hardness, making it a relatively hard substance.
