A sample of hard water from some source was found to release carbon dioxide gas when boiled. It is possible to titrate the sample of water from the same source with ?

Q. The total hardness value obtained from the complete analysis of a water sample was found to be 120 mg/l. If the value of carbonate hardness is 50mg/l, the non-carbonate hardness and alkalinity are, respectively

Q. A sample of pure carbon dioxide, irrespective of its source contains 27.27% carbon and 72.73% oxygen. The data supports:

Q. A $6.0g$ sample of carbon is burned to produce carbon dioxide. The yield from the reaction is only $60$%.
How much carbon dioxide was actually produced?

Q. 1) A welding fuel gas contain carbon and hydrogen only. Burning a small sample of it in oxygen gives $3.38$ g carbon dioxide, $0.690$ g of water and no other products. A volume of $10.0L$ (measured at STP) of this welding gas is found to weigh $11.6$ g. Calculate

A) Empirical formula

2) A welding fuel gas contain carbon and hydrogen only. Burning a small sample of it in oxygen gives $3.38$ g carbon dioxide, $0.690$ g of water and no other products. A volume of $10.0$L (measured at STP) of this welding gas is found to weigh $11.6$ g. Calculate

B) Molar mass of the gas

3) A welding fuel gas contain carbon and hydrogen only. Burning a small sample of it in oxygen gives $3.38$ g carbon dioxide, $0.690$ g of water and no other products. A volume of $10.0$L (measured at STP) of this welding gas is found to weigh $11.6$ g. Calculate

C) molecular formula

Q. A sample of carbon dioxide that undergoes a transformation from solid to liquid and then to gas would undergo _________.