 # Normal saline is a sodium chloride solution with a mass fraction of 0.9% When treating patients with severe dehydration acidosis, the mixture of normal saline and sodium bicarbonate solution is commonly used. The mixture can be prepared with 2.0kg normal saline and 1.0kg sodium bicarbonate solution with a mass fraction of 1.4%. The mass fractions of chlorine and sodium in the mixture are basically the same as those in plasma Please calculate the concentration in 100.0ml plasma: Mass of chlorine= Mass of sodium= (write the calculation formula, and the plasma density is regarded as 1.0g / cm ^ 3) Please write down the reason Can you say it more carefully? Some parts still don't understand

## Normal saline is a sodium chloride solution with a mass fraction of 0.9% When treating patients with severe dehydration acidosis, the mixture of normal saline and sodium bicarbonate solution is commonly used. The mixture can be prepared with 2.0kg normal saline and 1.0kg sodium bicarbonate solution with a mass fraction of 1.4%. The mass fractions of chlorine and sodium in the mixture are basically the same as those in plasma Please calculate the concentration in 100.0ml plasma: Mass of chlorine= Mass of sodium= (write the calculation formula, and the plasma density is regarded as 1.0g / cm ^ 3) Please write down the reason Can you say it more carefully? Some parts still don't understand

Mass of chlorine = (2.0 * 0.009) / (3000 / 100)
Mass of sodium = (2.0 * 0.009 + 1.0 * 0.014) / (3000 / 100)
Reason: take 2kg normal saline and 1kg sodium bicarbonate mixed solution as human blood, that is, the mass percentage of chlorine and sodium in 3kg blood is the same as that in blood, so the mass is 3000 / 100

### Main component: NaCl: H2O volume: 500ml content: 0.9% density; 1 g/cm3 Mass ratio of sodium to chlorine in sodium chloride What is the mass of sodium chloride that the bottle of saline can provide to the patient? How many grams of elements can the saline provide to the patient?

1.m(Na):m(Cl)=23:35.5
There is only sodium chloride in this solution, and the number ratio is also 1:1, so the mass ratio is the molar mass ratio
2.m(NaCl)=500mL*1g/mL*0.9%=4.5g
3.m(Na)=4.5*23/(23+35.5)=1.77g
m(Cl)=4.5-1.77=2.73g

### The medical normal saline is a NaCl solution with a mass fraction of 0.9% (the density is about 1g / cm to the third power). 500ml of this normal saline Contains NaCl? G water? g

NaCl content is 500 * 1 * 0.9% = 4.5g
Water content is 500 * 1-4.5 = 495.5g

### The mass fraction of sodium chloride in normal saline is 0.9%. How much sodium chloride does 1kg of normal saline contain

Because normal saline is a solution, its mass fraction remains unchanged no matter how many grams, so 1000gx0.9% = 9g

### Is the normal saline used in medical treatment a sodium chloride solution with a concentration of < >? Completion

0.9% sodium chloride, similar to the osmotic pressure of blood

### When does hydrogen peroxide react to produce only oxygen and when does it produce only water? When will water and oxygen be produced? Make a summary thank you Good classification

When does hydrogen peroxide react to produce only oxygen? Hydrogen peroxide is a reducing agent: 2kmno4 + 5h2o2 + 3h2so4 ==== 2mnso4 + K2SO4 + 5o2 ↑ + 8H2O 2kmno4 + 5h2o2 ==== 2Mn (OH) 2 + 2koh + 5o2 ↑ + 2h2oh2oh2o2 + Cl2 ==== 2HCl + O2 when does it only produce water? Hydrogen peroxide is